Question

how do i do x^2 - 40= 60

Answer 1

Add 40 to both sides which equals x^2=100. So now you find the square root of 100, which equals 10. So therefore x=10

Answer 2

Simplifying:
 x^{2} + -40 = 60
 
Reorder the terms:
-40 +  x^{2} = 60
 
Solving:
-40 +  x^{2} = 60

Solving for variable 'x'.
 
Move all terms containing x to the left, all other terms to the right.
 
Add '40' to each side of the equation.
-40 + 40 + x^{2} = 60 + 40
 
Combine like terms: -40 + 40 = 0
0 +  x^{2} = 60 + 40
 x^{2} = 60 + 40
 
Combine like terms: 60 + 40 = 100  x^{2} = 100
 
Simplifying  x^{2} = 100
 
Take the square root of each side: x = {-10, 10}

Hope This Helped! :3