Question

12-2.(-x+3)^2=-38

giúp mk vs nhá

Answer 1

2.(-x+3)=-38-12

2.(-x+3)=-50

-x+3=-50:2

-x+3=-25

-x=-25+3

-x=-22

x=22

Vậy x = 22

Answer 2

2.(-x+3)²=12-(-38)

2.(-x+3)²=50

(-x+3)²=50:2

(-x+3)²=25

(-x+3)²=5²

=> -x+3=5

-x=5-3

-x=2

Ta có :-x<0(với mọi x)

Mà 2>0

=>ko tìm được giá trị của x

Answer 3

     12-2.(-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)^2=5^2

=> -x+3=5

=> -x=5-3

=> -x=2

=> x=-2