Question

How do you FOIL `(x^2 + 7)(x^2 + 7)`?

Answer 1

`(x^2+7)(x^2+7)` evaluated using FOIL

F irst terms: `x^2 xx x^2 = x^4`
O utside terms: `x^2 xx 7 = 7x^2`
I nside terms: `7 xx x^2 = 7x^2`
L ast terms: `7 xx 7 = 49`

Sum of FOIL `= x^4 + 14x^2 + 49`