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Travka [436]
2 years ago
7

X^(2)+x-20 splitting the middle term

Mathematics
1 answer:
lubasha [3.4K]2 years ago
5 0
Are you trying to factorise this?

Here is a way you may not have been taught....
(x + a)(x + b) = x^2 + (a + b)x + ab

So you need to find two factors of -20 that add up to +1
-4 x 5 = -20 and -4 + 5 = 1. Perfect

x^2 + x - 20 = (x - 4)(x + 5)
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3 years ago
Read 2 more answers
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Fofino [41]

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  • Zero

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2 years ago
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