Question

Factor by grouping 10x^3-14x^2+45x-63

grouped? (10x^3-14x^2)+(45x-63)
after that I am confused .....

Answer 1

group is right

Answer 2

take out gcf's

Answer 3

:)

Answer 4

yea thats were I get confused

Answer 5

45x-63 - take out 9 to get 9(5x-7)

Answer 6

noww try and get 5x-7 from other part

Answer 7

take out 2x^2

Answer 8

2x^2(5x-7) + 9(5x-7)
can you carry on from there?

Answer 9

I will try .......the gcf is 5x-7 ?

Answer 10

yes 5x - 7 is common to both parts so whats left goes into another bracket

the final answer is

(5x+7)(2x^2 + 9)

2x^2 + 9 can't be factored any further so thats it

Answer 11

My book says to then factor out the common factor, so would I get 2x^2+9(5x=9)

Answer 12

oh I see

Answer 13

ok?

Answer 14

got it thanks

Answer 15

Hey, how did you get the 9(5x-7)?
Im trying to do another one
x^3+6x^2-7x-42
(x^3+6x^2)-(7x-42)
i got 7(6x-?) is that right so far?