Question

Multiply the polynomials (x + 2)(x^2 - 7x + 4)

Answer 1

(X+2)(x^2-7x+4)

=X^3-5x^2-10x+8

Answer 2

In multiplying two expressions we have to use distributive property that is (a+b)(c+d) = ac + ad + bc + bd .

So for
`(x + 2)(x^2 - 7x + 4)`

We will get

`(x )(x^2 - 7x + 4) +2(x^2 - 7x + 4) =x^3 -7x^2 +4x +2x^2 -14x +8 = x^3 -5x^2-10x+8`

And that's the required result of the product of the given expressions .