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horsena [70]
3 years ago
10

Factor completely. x^2+3x−40

Mathematics
2 answers:
ahrayia [7]3 years ago
7 0
Factorised form: (x+8)(x-5)

Explanation:
This is a quadratic equation, so the easiest way to solve this is by splitting up the middle term. What are two numbers that when multiplied gives -40, and adds to give 3? (8, -5)

You can then split up the middle term like so:
x² + 8x - 5x - 40 = 0

and factorise x² + 8x and -5x -40.
x(x + 8) -5(x + 8) and group together like terms:
(x - 5)(x + 8)
Elan Coil [88]3 years ago
6 0

Answer:

For anyone who needs this in the future, it's (x + 5)(x - 8).

This is the answer I got from the 4.11 quiz.

Step-by-step explanation:

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