2.(-X +3 )^2=50
(-X +3 )^2=25
(-X+3)=5 <=> X=-2(-X+3)= -5 <=> X=812 - 2.(-x + 3)^2=-38
2.(-x + 3)^2= 12 - (-38)
2.(-x + 3)^2=50
(-x +3)^2=50:2
(-x +3)^2= 25
=> -x + 3 = 5
x = -2
-x + 3 = -5
-x = -5 - 3
-x =-8
=> x = 8 hoặc -2
2.(-X +3 )^2=50
(-X +3 )^2=25
(-X+3)=5 <=> X=-2(-X+3)= -5 <=> X=812 - 2.(-x + 3)^2=-38
2.(-x + 3)^2= 12 - (-38)
2.(-x + 3)^2=50
(-x +3)^2=50:2
(-x +3)^2= 25
=> -x + 3 = 5
x = -2
-x + 3 = -5
-x = -5 - 3
-x =-8
=> x = 8 hoặc -2
12 x 62 x 3 + 6 mũ 2 x 38 - 125: 25
CÂU1: 1) 123-5( x + 14 )=38 2) 12+2. ( x + 6)= 72 3) 2.x+x=45
2 . ( x + 3 ) + [ 38 - ( 12 - 9 ) 3 ] = 2 . ( x + 1 ) + 8 3
12-2.(-x+3)^2=-38
giúp mk vs nhá
3 x 25 x 8 + 4 x 37 x 6 +2 x 38 x 12
Tìm số nguyên x biết :
a, -28 - 7.|-3x + 15| = -70
b, |18 - 2 |-x + 5|| = 12
c, 12 - 2.(-x + 3)mũ 2 = -38
d, -20 + 3.(2x +1)mũ 3 = -101
tính giá trị các biểu thức sau
a) (28^2 : 112 + 53) x 3^0 - 60
b) 4725 - [36 x (254 - 12^2) = 21^2]
c) 514 x 38 + 38 . 487 - 19 x 2
d) 34 + 39 + 44 + 49 +...+ 104 + 109
Tìm x biết
1) 2.(x +5)+3.(x+7)=41. 6) 7. (x -1)+5.(3-x)=11.x-10
2) 5. ( x +6 ) +2.(x-3)=38. 7) 4. (2+x)+3(x-2)=12
3) 7.(5+x)+2.(x-10)=15. 8) 5. ( 2+x) +4.(3-x)=10x-15
4) 3. (x+4)+(8-2.x) =22. 9) 7.(x-2) +5.(3-x)=11x-6
5) 4. (x+5)+3.(7-x)=49. 10) 5.(3-x)+5.(x+4)=6+4x
2 x 3 x 4 x 5 x 38 + 6 x 20 x 51 + 10 x 11 x 12
1) 7. (3x+5)+2.(7x+14)=98. 2) 4. (x -5)+3.(x+7)=22
3) 5.(4-x) +7.(x-2)=24. 4) 3.(x -5)+6.(x+3)=12
5) 4-x+5.(x+2)=38. 6) 5.( x-3)+2.(x+8)=22
7) 5.(x-7)+10.(4+x)=20. 8) 4.(x+10)+8.(x-3)=24
9) 4.(5-x)+5.(x-2)=15. 10) 4.(x-1)+3.(x-2)=-1