Question

Determine the values of x in the equation x2 = 49. a. x = ±7 b. x = −7 c. x = ±24.5 d. x = 24.5

Answer 1

a

Explanation:

x² = 49 ( take square root of both sides )

`√(x^2)` = ±
`√(49)`

x = ± 7

that is x = - 7 , x = 7

since 7 × 7 = 49 and - 7 × - 7 = 49