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April 21, 2015

Posted by **luna** on Tuesday, November 22, 2011 at 2:59pm.

1). (x+4)(x-12)=5x

2). 4x^2+2x-14=16-17x

- college math -
**Steve**, Tuesday, November 22, 2011 at 11:24pmThis is an example of why we always get everything on the left side, then factor to make the product zero:

(x+4)(x-12) = 5x

x^2 - 8x - 48 = 5x

x^2 - 13x - 48 = 0

(x-16)(x+3) = 0

Now we have a zero product. That means that if any of the factors is zero, then the product is also zero.

So, x = -3 or 16

Now do the same steps with the second equation

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