Question

Solve the equation using square root method, show work

Answer 1

Explanation:

2(x+7)^2 =98

(x+7)^2 = 49 (divide both sides by 2)

(x +7) =
`√(49)` (square root both sides)

x + 7 = 7 ( we are not sure if this is -7 or +7, because either would work )

so we have two solutions now

x +7 = -7 or x +7 = 7

x = -7 -7 or x =7 -7 (subtract 7 from both sides)

x = - 14 or x = 0