Question

Which of the following are solutions to the equation below? Check all that apply. 4x2 - 81 = 0 A. 9 B.-9/2 C.-2/9 D.-9 E.9/2 F.2/9

Answer 1

I guess the answer is e

Answer 2

Answer: B. -9/2 and E. 9/2

Explanation:

4x² - 81 = 0

Add 81 to bothside

4x² - 81 + 81 = 0+ 81

4x² = 81

Divide bothside by 4

4x²/4 = 81 /4

x² = 81/4

Take the square root of both side

√ x² = ±√81/4

x = ± 9/2

x = -9/2 or x = 9/2

x = -9/2 or 9/2