Answer:
(2x+9)(2x-9)
Step-by-step explanation:
kind of simple actually
4x^2-81=(2x+9)(2x-9)
(2x - 9)(2x + 9)
4x^2 - 81 = (2x - 9)(2x + 9)
13.8 cm
the sides of the triangle measure 3.6, 5.7,4.5cm?
So, we have
perimeter is 3.6 + 5.7 + 4.5
