Question

The roots of the quadratic equation 4x2 − 81 = 0 are

Answer 1

Answer:

D) +9/2 or -9/2

Step-by-step explanation:

4x^2 -81=0

(2x)^2 - (9)^2=0

(2x+9)(2x-9)=0

either or

2x+9=0 2x-9=0

x=-9/2 x=9/2

Hope it will help you.