What’s the answer to x2-4x=5 if you factor it?

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What’s the answer to x2-4x=5 if you factor it?

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Answer 1 · 2018-03-12T04:36:04

$(x - 5) (x + 1)$ $(x-5)(x+1)$

Explanation:

Subtract $5$ $5$ from both sides. You then have:

$x^{2} - 4 x - 5 = 0$ $x^2-4x-5 = 0$

Then, what two numbers can you multiply to get $- 5$ $-5$ and add to get $- 4$ $-4$ ? The answer is $- 5$ $-5$ and $1$ $1$ . So, make them into factors.

Your answer is then

$(x - 5) (x + 1)$ $(x-5)(x+1)$

FOIL it and you get to what you originally had.

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What’s the answer to x2-4x=5 if you factor it?

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