tìm x biết:
a) (x-3)2-4=0
b) x2-2x=24
c) (x+4)2-(x+1)(x-1)=16
d) (2x+1)2-4(x-1)2=9
e) (x+3)2-(x-4)(x+8)=1
f) (2x-1)2+(x+3)2-5(x+7)(x-7)=0
g) 3(x+2)2+(2x-1)2-7(x+3)(x-3)=36
NHỮNG HẰNG ĐẲNG THỨC ĐÁNG NHỚ
- Bài 1 : Tìm x biết
a. 25x2 - 9 = 0
b. ( x + 4 )2 - ( x+1 ).(x-1) = 16
c. (2x-1)2 + (x+3)2 - 5.(x+7).(x-7) = 0
______ GIÚP MÌNH NHA MÌNH CẦN GẤP_______
A, (x-2)^2=4x^2+4x+1 B, 25x^2-9=0 C, (2x-1)^2+(x+3)^2-5(x+7)(x-7)=0 D, (2x+1)(x-4)-2(x-3)^2=8 E, (3x-1)^2=(5-x)^2
Tìm x
a,(7x+4)^2-(7x+4)(7x-4)=0
b, 5( x + 3 )( x - 3 ) + ( 2x + 3 )^2+(x-6)^=10
c, (x + 1)^3 + (x – 2)^3 – 2x^2 (x – 1,5) = 3
d,( x + 2)(x^2 – 2x + 4)(x – 2)(x^2 + 2x + 4) = – 65
e, 4x^2 + 4x – 5 = 2
f,16x^2 – 9(x + 1)^2 = 0
Các bạn giúp mình vs mai mình phải nộp rùii
Tìm x biết
a,(x+4)^2-(x+1)(x-1)=16
b,(2x-1)^2-(x+3)-5(x-7)(x+7)=0
c,3(x-1)^2-3x(x-5)=1
d,6(x-2)^2+(5x-2)^2-4(3x-1)(5x-2)=0
e,(x-2)^3-x^2(x-6)=4
g,(x-1)(x^2+x+1)-x(x+2)(x-2)=5
h,(x-1)^3-(x+3)(x^2-3x+9)+3(x^2-4)=2
1, tìm x :
a) (x+2).(x+3)-(x-2).(x+5)=0
b) (2x+3).(x-4)+(x-5).(x-2)=(x-4).(3x-5)
c) (3x-5).(7-5x)-(5x+2).(2-3x)=3
d)(x-7).(x+7)-(x-4)2-x=10+3
e) (x+1/2)2-(x-1).(x+1)=2x-1
2, Thu gọn :
a) (x+5)2-(3-x)2-2(x-4).(x+4)
b)4(x-1)2+(2x+3)2-8(x-2)(x+2)
Tìm x:
a) (x - 2) (x2 + 2x + 7) + 2 (x2 - 4) - 5 (x - 2) = 0
b) 3x (x - 1) + (x - 1) = 0
c) 2 (x + 3) x2 - 3x = 0
d) 4x2 - 25 - (2x - 5)(2x + 7) = 0
e) x3 + 27(x + 3)(x - 9) = 0
1, tìm x :
a) (x+2).(x+3)-(x-2).(x+5)=0
b) (2x+3).(x-4)+(x-5).(x-2)=(x-4).(3x-5)
c) (3x-5).(7-5x)-(5x+2).(2-3x)=3
d)(x-7).(x+7)-(x-4)2-x=10+3
e) (x+1/2)2-(x-1).(x+1)=2x-1
2, Thu gọn :
a) (x+5)2-(3-x)2-2(x-4).(x+4)
b)4(x-1)2+(2x+3)2-8(x-2)(x+2)
I. Tìm x biết
a) ( x - 3 )2 - 4 = 0
b) x2 - 2x = 24
c) ( 2x + 1 )2 + ( x + 3 )2 - 5 ( x - 7 ) ( x + 7 ) = 0
d) ( x - 3 ) ( x2 + 3x + 9 ) + x ( x + 2 ) ( 2 - x ) = 1
e) ( 3x - 1 )2 + 2 ( x + 3 )2 + 11 ( x + 1 ) ( 1 - x ) = 6
Các bạn giúp mình với chiều nay mình phải nộp bài rồi!!