Posted by Nini on Monday, April 6, 2009 at 4:47pm.
Online, x^2 = x squared.
6x^2 - 21xy + 8xz - 28xz = 6x^2 - 21xy - 20xz =
x(6x - 21y - 20z)
x^2 + 5x + 7x +35 = x^2 + 12x + 35
What two numbers would give a product of 35 and add to 12? That should help you factor.
I hope this helps. Thanks for asking.
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