Question

How do you foil `(10x – 11)(–14x + 9)`?

Answer 1

`-140x^2+244x-99`

Explanation:

FOIL stands for Firsts, Outsides, Insides, Lasts, meaning we multiply the terms in the binomial in that order.

• First terms: `10x*-14x=-140x^2`
• Outside terms: `10x*9=90x`
• Inside terms: `-11*-14x=154x`
• Last terms: `-11*9=-99`

Thus we have

`-140x^2+90x-154x-99`

The middle will simplify to `244x` and we're left with:

`-140x^2+244x-99`

Hope this helps!