Question

factor by grouping
a^2+3ab-70b^2

Answer 1

https://www.wolframalpha.com/input/?i=a%5E2%2B3ab-70b%5E2+factor

Answer 2

thank you

Answer 3

Anytime, I don't like flexing my brain when not needed :)

Answer 4

lml

Answer 5

Get the multiple of 1st and last term it is 1*(-70) = -70
Try to break it into 2 numbers which add upto +3
As the product is negative one number is positive other is negative but the some is positive so highest no should be positive so we go for +10 ,-7

Answer 6

ummm ok

Answer 7

Now factorize it substitiute for +10ab -7ab for +3ab