we are given the following expression and we are to factorize it:
we are to find factors of 36 such that when multiplied they give a product of 36 and when added they give a result of -13.
therefore, the factored form of the given expression is (d-4)(d-9).
64 - 9x^2
we can factor this expression since the is the difference of squares
(a^2 - b^2) = (a-b) (a+b)
let 64 = a^2 so a =8
let 9x^2 = b^2 so b = 3x
64 - 9x^2 = (8-3x) (8+3x)