Thursday
October 30, 2014

Homework Help: Algebra

Posted by Serra on Monday, August 20, 2007 at 9:16am.

Find the values of the polynomial for the given values of the variable.

-x2-5x-6

x=-3
x=-2



I got 0 for the first one and 0 for the second. Am I figuring them wrong? (and that is an x squared, not 2x)

-(-3)^2 -5(-3)-6
-(9)+15-6=0



Thanks!

you are right in both cases

-x^2-5x-6
=-(x^2+5x+6)
=-(x+2)(x+3)

notice if this had been an equation equal to zero,
x=-2 and x=-3 would have been solutions.
That is why both values gave you a zero answer.

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