Question 31501: factor completely
12x^yz^3-15xyz^3
so far I have
3xy(4xz^2-5y)
3xy[x(2z)^2-5y]
I just don't have the last step Answer by mukhopadhyay(490) (Show Source):
You can put this solution on YOUR website! 12x^yz^3-15xyz^3
so far I have
3xy(4xz^2-5y)
3xy[x(2z)^2-5y]
.
.
=3xy[{sqrt(x)}^2(2z)^2 - sqrt(5y)^2]
=3xy[2zsqrt(x) + sqrt(5y)][2zsqrt(x) - sqrt(5y)] (using a^2-b^2=(a+b)(a-b))
(