2 years ago

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

1 answer:

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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pogonyaev

Answer:

9 units

Step-by-step explanation:

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3 years ago

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

The crowd at a music concert is estimated to be 14,000 people. The exact attendance is 10,528 people. What is the percent error?

Dmitriy789 [7]

Answer:

32.9%

Step-by-step explanation:

14,000-10,528=3,472

3,472/10,528=0.32978723

Idk what your supposed to round to, but I put 32.9%

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3 years ago