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

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Answer 1 · 2015-06-07T21:40:34

$(x^2+7)(x^2+7)$ 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 $= x^4 + 14x^2 + 49$

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