Question

Which of the following are solutions to the following equation?

2x²-98=0
Check all that apply.
A. 7
B. -7
□ C. -√7
□ D. V7

Answer 1

A and B

Explanation:

given the equation

2x² - 98 = 0 ( add 98 to both sides )

2x² = 98 ( divide both sides by 2 )

x² = 49 ( take square root of both sides )

`√(x^2)` = ±
`√(49)` , that is

x = ± 7

solutions are x = - 7 and x = 7