tip
9x^2 - 42x + 49=0
divide through by 9
x^2 - 42x/9 + 49/9=0
then
x^2 - 14x/3 + 49/9=0
then
x^2 - 14x/3 + (7/9)^2=0
x^2 - (2)x7/3 + (7/3)^2=0
compare
(x-a)^2=x^2-2ax+a^2
does this help?
Factor: 9x^2 - 42x + 49
So far I have 3(3x^2 - 14x + ) I have no idea if this is right or if this equation is prime. Or if I'm solving it correctly.
3 answers
I'm even more confused then before.
2ax+4bx-3ay-6by