8x + 2x = 25.22
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Tìm x
8x+2x=25.22
Mong các bạn giúp mik
`8x+2x=25 . 2^2`
`=>(8+2)x=25 . 4`
`=>10x=100`
`=>x=100:10`
`=>x=10`
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a) | - 25 | + ( 45 - 126 + 174) - (174 + 145 - 126)
b) 25.22 - ( 9-14) + ( 29 - 34 + 20 )
a) |-25|+(45-126+174)-(174+145-126)
= 25+45-126+174-174-145+126
= (45-145)+(126-126)+(174-174)+25
= 100+0+0+25
= 125
b) 25.22-(9-14)+(29-34+20)
= 25.4+5+15
=100+20
=120
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a) (-25) + 45 -126+174-174-145+126
= (-25) + ( -145+ 45) +( -126+ 126) + ( +174-174)
= (-25) + -100+ -100+ 0
= (- 25) + (-200)
= -225
phần a) của bạn nò<333
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Điền vào ô vuông các dấu thích hợp (; ; ):a,
3
+
4
2
□
3
2
+
4
2
b,
4
3
-...
Đọc tiếp
Điền vào ô vuông các dấu thích hợp (=; <; >):
a, 3 + 4 2 □ 3 2 + 4 2
b, 4 3 - 2 3 □ 2 . 4 - 2 3
c, 2 2 . 3 - 1 10 + 8 : 3 2 □ 5 2 . 3 2 - 25 . 2 2
d, 4 20 : 4 15 . 7 + 4 15 . 9 □ 3 . 5 2 - 6 2 + 5 . 10 : 2
Điền vào ô vuông các dấu thích hợp (; ; ):a)
(
3
+
4
)
2
□
3
2
+
4
2
;
b)
4
3
-
2
3
□
2
.
(
4
-
2...
Đọc tiếp
Điền vào ô vuông các dấu thích hợp (=; <; >):
a) ( 3 + 4 ) 2 □ 3 2 + 4 2 ;
b) 4 3 - 2 3 □ 2 . ( 4 - 2 ) 3 ;
c) 2 2 . 3 - ( 1 10 + 8 ) : 3 2 □ 5 2 . 3 2 - 25 . 2 2 ;
d) 4 20 : ( 4 15 . 7 + 4 15 . 9 ) □ 3 . 5 2 - 6 2 + 5 . 10 : 2 .
24 tháng 2 2022 lúc 8:47
V. Choose the word(s) OPPOSITE in meaning to the underlined word(s). 24.21. Despite being a( loser), Henry performed well in the final game. A. champion B. player C. sportsman D. reporter 25.22. Running, taekwondo and archery are some examples of (individual) sports. A. indoor B. outdoor C. team D. professional 26.23. You look (fantastic) in those clothes. A. great B. amazing C. OK D. terrible 27.24. My teacher believes that the invention of fridge is very (practical).A. useful B. lucky C...
Đọc tiếp
V. Choose the word(s) OPPOSITE in meaning to the underlined word(s).
24.21. Despite being a( loser), Henry performed well in the final game.
A. champion
B. player
C. sportsman
D. reporter
25.22. Running, taekwondo and archery are some examples of (individual) sports.
A. indoor
B. outdoor
C. team
D. professional
26.23. You look (fantastic) in those clothes.
A. great
B. amazing
C. OK
D. terrible
27.24. My teacher believes that the invention of fridge is very (practical).
A. useful
B. lucky
C. unrealistic
D. unaffordable
28.25. In our school, we can wear (casual) clothes on Tuesday and Friday.
A. formal
B. uniform
C. fashionable
D. cutting-edge
Vẫn là mở ngoặc thay cho gạch chân ạ
V. Choose the word(s) OPPOSITE in meaning to the underlined word(s).
24.21. Despite being a( loser), Henry performed well in the final game.
A. champion
B. player
C. sportsman
D. reporter
25.22. Running, taekwondo and archery are some examples of (individual) sports.
A. indoor
B. outdoor
C. team
D. professional
26.23. You look (fantastic) in those clothes.
A. great
B. amazing
C. OK
D. terrible
27.24. My teacher believes that the invention of fridge is very (practical).
A. useful
B. lucky
C. unrealistic
D. unaffordable
28.25. In our school, we can wear (casual) clothes on Tuesday and Friday.
A. formal
B. uniform
C. fashionable
D. cutting-edge
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24.21. Despite being a( loser), Henry performed well in the final game.
A. champion
B. player
C. sportsman
D. reporter
25.22. Running, taekwondo and archery are some examples of (individual) sports.
A. indoor
B. outdoor
C. team
D. professional
26.23. You look (fantastic) in those clothes.
A. great
B. amazing
C. OK
D. terrible
27.24. My teacher believes that the invention of fridge is very (practical).
A. useful
B. lucky
C. unrealistic
D. unaffordable
28.25. In our school, we can wear (casual) clothes on Tuesday and Friday.
A. formal
B. uniform
C. fashionable
D. cutting-edge
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Tìn min
C=\(\frac{x^4+2x^3+8x+16}{x^4-2x^3+8x^2-8x+616}\)
Tìm GTNN của:
\(x = {x^4+2x^3 +8x+16 \over x^4-2x^3+8x^2-8x+16}\)
Tử \(x^4+2x^3+8x+16\)
\(=x^4-2x^3+4x^2+4x^3-8x^2+16x+4x^2-8x+16\)
\(=x^2\left(x^2-2x+4\right)+4x\left(x^2-2x+4\right)+4\left(x^2-2x+4\right)\)
\(=\left(x^2+4x+4\right)\left(x^2-2x+4\right)\)
\(=\left(x+2\right)^2\left(x^2-2x+4\right)\)
Mẫu \(x^4-2x^3+8x^2-8x+16\)
\(=x^4-2x^3+4x^2+4x^2-8x+16\)
\(=x^2\left(x^2-2x+4\right)+4\left(x^2-2x+4\right)\)
\(=\left(x^2+4\right)\left(x^2-2x+4\right)\)
Thay tử và mẫu vào ta có:\(\frac{\left(x+2\right)^2\left(x^2-2x+4\right)}{\left(x^2+4\right)\left(x^2-2x+4\right)}=\frac{\left(x+2\right)^2}{x^2+4}\ge0\)
Dấu "=" khi \(\left(x+2\right)^2=0\Leftrightarrow x=-2\)
Vậy Min=0 khi x=-2
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Giải phương trình
2+\(\frac{2x^2-8x}{2x^2+8x}+\frac{2x^2+7x+23}{2x^2+7x-4}=\frac{2x+5}{2x-1}\)
tìm x:
b.(2x+1)(16x^4-8x^3+4x^2-2x+1)-(2x-1)(16x^4+8x^3+4x^2+2x+1)=2
Bạn nhân đa thức với đa thức
Theo bài ra, ta suy ra được:
32x^5 +1 -(32x^5 -1) =2
2 = 2
Vậy có vô số x thỏa mãn đề bài.
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2x^2-8x^2+8x
\(2x^2-8x^2+8x=-6x^2+8x=-2x\left(3x-4\right)\)
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