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Q: Factor x.2 plus 10.x plus 21?

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x2+10x+21 = (x+3)(x+7)

x2 + 10x + 21 = (x + 3)(x + 7)

x2+10x-336

(x2+10x+21)/(x+3) = (x+7)

(x - 7)(x - 3)

If that's + 10x + 21, the answer is (x + 7)(x + 3)

(x - 3)(x - 7)

If that was - 10x + 21, it would factor to (x - 3)(x - 7) If that was + 10x + 21, it would factor to (x + 3)(x + 7) As it is, the solutions are irrational.

That expression can not be factored.

x2+10x-24 = (x-2)(x+12)

Factor the polynomial x2 - 10x + 25. Enter each factor as a polynomial in descending order.

Factorising, we obtain, x2 + 10x + 21 = (x + 7)(x + 3). Thus, x2 + 10x + 21 / (x + 3) = x + 7. That's usually easier than dividing it out!

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