Question

need help solving this factoring problem.

M^2-M-90

Answer 1

so we have to find what adds to -1 and multiplies to -90.

Answer 2

correct

Answer 3

I tried both -90 or otherwise -1 but I was wrong on the -1

Answer 4

hint: \(\begin{array}{cccllll}
M^2&-M&-90\\
&\uparrow &\uparrow \\
&9-10&9\cdot -10
\end{array}\)

Answer 5

but I though on the problem I would have to have one + and one _ at the end inside the ( ) ( )

Answer 6

because of the rules

Answer 7

yes I just got sorry thanks