For this case we have the following equation:
[tex]y ^ 2 + 7y = 18[/tex]
Rewriting the equation we have:
[tex]y ^ 2 + 7y-18 = 0[/tex]
Then, we must factor the equation:
We are looking for two numbers that are equal to 7 and multiplied equal to -18.
We have then:
[tex](y + 9) (y-2) = 0[/tex]
Answer:
An equation that could be used to solve [tex]y^2 + 7y = 18[/tex] by factoring is:
[tex](y + 9) (y-2) = 0[/tex]
