Factor (x² + 5x - 7)(x + 2)? HELP!!?
Out of all of the questions i finished, this was the only one i was stuck on. Please show me how to do it?
HELP PLEASE!!! Best answer 10 points!!
:)
Update:I know it is x³ + 7x² + 3x - 14, but i don't know how to simplify THAT.
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That problem cannot be factored any further. If it could, the quadratic equation would give you the last two answers, but if you plug x^2+5x-7 into the quadratic formula you end up with [-5 +/- sqrt(53)]/2 which does not make a pretty number. I tried grouping the fourth degree polynomial as well and it doesn't work.
x^3 + 2x^2 + 5x^2 + 10x -7x - 14
Simplifies to:
x^3 + 7x^2 + 3x - 14 :)