Question

(a) To factor 5x2 − 16x − 16 by grouping, first find two integers whose product is 5(−16) = and whose sum is the coefficient of the middle term,_______ . These two integers, in increasing order, are _________and ____________.
(b) Complete the factoring by grouping.
5x2 − 16x − 16 = 5x2 − 20x + ________− 16
= (5x2 − 20x) + (________ )
= 5x(________ ) + __________(x − 4)
= ____________