Best Answer

If you mean:

5x2 + 10x + 40

Then the only factoring you can do is to divide it by five:

5(x2 + 2x + 8)

beyond which it can not be factored.

If on the other hand you mean:

5x2 + 10x - 40

Then you can factor it out as follows:

5x2 + 10x - 40

= 5(x2 + 2x - 8)

= 5(x2 - 2x + 4x - 8)

= 5(x(x - 2) + 4(x - 2))

= 5(x + 4)(x - 2)

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โˆ™ 2012-02-18 05:04:08
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Q: How do you factor 5x2 plus 10x 40?
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