3 years ago

Factor x2 - 8x + 15.

Mathematics

1 answer:

STALIN [3.7K]3 years ago

6 0

Answer:

(X-5)(x-3)

Step-by-step explanation:

X^2-8x+15

What multiplies of 15 add up to -8?

-5 and -8

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Answer:

Hello,

answer B

Step-by-step explanation:

$\dfrac{2}{x} -\dfrac{x}{x+5} =\dfrac{10}{x^2+5x} \\\\we\ suppose\ x\neq 0\ and\ x\neq -5\\\\\text{Reducing to the same denominator}\\\dfrac{2(x+5)-x^2}{x(x+5)} =\dfrac{10}{x^2+5x} \\\\Simplify\ by\ x^2+5x\\\\2x+10-x^2=10\\\\-x^2+2x=0\\\\-x(x-2)=0\\\\roots\ are\ 2 \ and\ 0\ (to\ be\ excluded)\\\\Root=2\\$

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