Quadratiic formula - solving equations by factoring problem....?

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Quadratiic formula - solving equations by factoring problem....?

-5 ( 6X-5) + 9X^2 +3 =3
9X^2 - 30X +25 = 0
first i set it equal to 0
then factor
here is where i get stuck
(9X + ?) (X +?) = 0
where the question marks are, I need to put numbers that i thought multiplied together and added together were supposed to equal -30 and 25.
thanks if you can help

2007-08-28 09:09:32 · 3 answers · asked by Boo Radley 4 in Science & Mathematics ➔ Mathematics

3 answers

(3x - 5)(3x - 5) = 0
.

2007-08-28 09:19:45 · answer #1 · answered by Robert L 7 · 0⤊ 0⤋

Hint: 3*5 = 15 and 3*3 = 9 and 5*5 = 25

2007-08-28 16:18:19 · answer #2 · answered by Captain Mephisto 7 · 0⤊ 0⤋

It can also be (3x + ?) (3x + ?)

2007-08-28 16:14:19 · answer #3 · answered by ichweissallez 2 · 0⤊ 0⤋