Question

how would I factor
9x^2+42x+49?
I got up to
9x2+21x+21x+49
but 9 and 49 dont have a GCF

Answer 1

3x

Answer 2

Break the 9x^2 into (3x+a)(3x+b)

Answer 3

u hv to take GCF of first two terms and last two terms..

Answer 4

9x²+42x+49?

9x²+21x+21x+49
------- -------

3x(3x + 7) +7 (3x + 7)

Answer 5

got it???

Answer 6

9x2+21x+21x+49 bracket off
[9x2+21x]+[21x+49] factorise each bracket
3x[3x+7] + 7[3x + 7]

Hence factors are [3x + 7]^2

Answer 7

where do you get 49 from 3x(3x + 7) +7 (3x + 7)

Answer 8

7*7

Answer 9

wow...i feel stupid

Answer 10

no problem.....
as long as u r trying hard to learn...☺

Answer 11

ok thanks