Question

-3x^2 + 30x - 90 = 0
Do you divide everything by 3 or -3?

Answer 1

i would divide by \(-3\) to make the leading coefficient 1
that will make it easier to deal with

Answer 2

Factor out the -3 first, then divide both sides by -3

-3(x^2 -10x + 30) = 0
x^2 - 10x + 30 = 0