Question

What value of c makes the polynomial below a perfect square?

Answer 1

81/4
Because I found the answer by using a Calculator I found online

Answer 2

Answer:

B

Step-by-step explanation:

x² + 9x

to complete the square

add ( half the coefficient of the x- term )² to x² + 9x

= x² + 2($\frac{9}{2}$ )x + ($\frac{9}{2}$ )²

= x² + 9x + $\frac{81}{4}$ ← the value of c

= (x + $\frac{9}{2}$ )² ← a perfect square