
Mark M. answered 01/22/17
Tutor
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(278)
Mathematics Teacher - NCLB Highly Qualified
(4x2 + 5x)2 - 5(4x2 + 5x) - 6
let u = 4x2 + 5x
u2 - 5u - 6
(u - 6)(u + 1)
(4x2 + 5x - 6)(4x2 + 5x + 1)
Can you factor both?