Question

Factor completely 4x2 − 81. (1 point)

a
(4x − 9)(x + 9)

b
(2x + 9)(2x + 9)

c
(2x + 9)(2x − 9)

d
(2x − 9)(2x − 9)

Answer 1

(2x-9)(2x+9)

Use the difference of square method. square root both sides and the answer has to be in postive and negative