Question

Which expression is a factor of 2xy + 6x – 3y – 9?

Answer 1

this can be grouped in pairs

(2xy - 3y) + (6x - 9)

factorise each pair

y(2x - 3) + 3(2x - 3)

2x - 3 is common to both

so the factorised form is

(2x -3)( y + 3)

Answer 2

Wow I never expected an answer so fast! Thanks alot, factoring is like the hardest way for me to solve problems. Like when I'm solving a quadratic, I just use completing the square or the quadratic formula. Questions that ask me to factor things out completely take me a really long time--unless there simple, like x^2+4x+4 or something.