Question

X^2- 7 = 42 solve for the variable

Answer 1

x^2 - 7 = 42

step 1 add 7 to both sides to get i.e the minius 7 on the left becomes plus seven in the right.

42 + 7 = 49 to give

x^2 = 49

then take the square root of 49 as X is squared in the left

to give X = 7

Answer 2

x = ±7

Explanation:

x² - 7 = 42

add 7 to both sides

x² = 49

take the square root of both sides

x = ±7