Question

First factor the trinomial as a binomial square and then use the square root method to solve. x^2 - 20x + 100 = 36
A. {-6,6}
B. {-5/3,5/3}
C. {6,10}
D. {4,16}

Answer 1

x^2 - 20x + 100 is a square. It is of the form (a-b)^2. So, find the square and use that to find the answer.

Answer 2

(x-10)^2 = 36

\[x-10 =\pm6\]

\[x = 10\pm6\]

you can finish it to get 2 answers for x