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

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

Step-by-step 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

answer: i think it's a

step-by-step explanation: