Question

Given the quadratic expression, find the value of C to complete the square. Then write the expression as a binomial squared.

x^2-18x+C​

Answer 1

81

Explanation:

Move −18x, so

x^2+c−18x

To find the c value

c =(b/2)^2

divide the coefficient of x by 2 and square the result.

Divide 18 by 2

(-1⋅9)^2

Multiply −1 by 9

(−9)^2

Raise −9 to the power of 2 and get your answer

=81

Answer 2

`(x - 9)^(2)`