Question

PLEASE HELP!!
What number must you add to complete the square?
x^2 + 8x =9

a. 8
b. 16
c. 32
d. 4

Answer 1

if you have

\[x^2 + bx\]

to complete the square you need to add

\[(\frac{b}{2})^2\]

to both sides on the equation

Answer 2

is it d. 4?? @campbell_st

Answer 3

the value of b in your question is 8

so halve it

then square the answer, that will be the value of what is added to complete the square

Answer 4

its b.16 right??