Question

x2 + 18x + 76 = 0

Which of the following is the first correct step to write the above equation in the form (x - p)2 = q, where p and q are integers?

Answer 1

Okay, I'm going to change the equation to just\[x^2+18x+76\]

Answer 2

18x is the middle term, which means that the coefficient we're going to halve is 18.

Answer 3

\[18\div2=9\]

Answer 4

\[9^2=?\]

Answer 5

\[x^2+18x+76=0\]

Answer 6

\[x^2+18x+76+???=0+???\]

Answer 7

add five to both sides\[x^2+18x+81\]

Answer 8

ok

Answer 9

thanks

Answer 10

No problem.