I am trying to solve 3x+10x(5xsquare-7x-9)+(-9x+1)

3x+10x(5xsquare-7x-9)+(-9x+1)
3x+50xsquare-70xsquare-9+90xsquare+10
3x-30x

amaria said:

3x+10x(5xsquare-7x-9)+(-9x+1)
3x+50xsquare-70xsquare-9+90xsquare+10

Click to expand...

How did (10x)(5x[sup:3nwd6db5]2[/sup:3nwd6db5]) become 50x[sup:3nwd6db5]2[/sup:3nwd6db5]? How did (10x)(-9) become -9? How did -9x + 1 become 10? :shock:

You might want to review exponents, how to multiply polynomials, and how to combine "like" terms. :wink:

Eliz.