Question

I need help with the first question please.

Answer 1

x^2 - 13x + 36

Explanation:

Use the so-called FOIL method: multiply First terms, Outer terms, Inner terms, Last terms.

First terms: (x)(x) = x^2

Outer terms: (x)(-9) = -9x

Inner terms: (-4)(x) = -4x

Last terms: (-9)(-4) = 36

Combining the x terms, we get

x^2 - 13x + 36