Question

Solve by factoring the trinomial as a binomial square and then use the square root method. Round to the nearest tenth, if necessary.
x2 + 16x + 64 = 81

a: {9, -9}
b: {-8, 9}
c: {-17, 1}
d: no real solution

Answer 1

This is the factorization of a binomial square.

\(a^2 + 2ab + b^2 = (a + b)^2\)