Question

First factor the trinomial as a binomial square and then use the square root method to solve. x2 - 20x + 100 = 36
A. {-6, 6}
B. {-5/3, 5/3}
C. {6, 10}
D. {4, 16}

Answer 1

x2 - 20x + 100 = 36

(x-10)^2 = 36
x-10 =±6

so x=16 or x=4

Answer 2

D