Question

Find the product of (x + 7)2.

x2 − 14x + 49

x2 + 14x + 49

x2 − 49

x2 + 49

Answer 1

x^2 14x + 49

Explanation:

Use F.O.I.L method

FIRST: x * x = x^2

OUTSIDE: 7*x

INSIDE: 7*x

LAST: 7*7= 49

x^2 + 7x + 7x + 49

x^2 14x + 49

Answer 2

x^2 + 14x + 49

Explanation:

(x + 7)^2

use the perfect trinomial formula: (a+b)^2 = a^2 -2ab +b^2

input variables

(x+7)^2 = x^2 -2(7)(x) +7^2

= x^2 -14(x) + 49

= x^2 -14x + 49