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Mateo Burke
23 April, 06:33
X^2-x-20 how do I write that in factored form
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Pretty Lady
23 April, 07:22
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(x - 5) (x + 4)
Step-by-step explanation:
When solving quadratic equations it's important to remember that they have 2 solution. We need to work out the factors, sum and the products to successfully factorise the quadratic and solve it. So,
x² - x - 20 = 0
Sum = - 1
Product = - 20
So we need two numbers that sum to - 1 and multiply together to make - 20
Factors = - 5 and 4
x² - 5x + 4x - 20
Factor x² - 5x and 4x - 20 separately
x² - 5x = x (x - 5)
4x - 20 = 4 (x - 5) So
x (x - 5) + 4 (x - 5)
We can see a common factor of (x - 5) and the other bracket would be (x + 4)
(x - 5) (x + 4)
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Brendan Green
23 April, 08:59
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(x+4) (x-5)
Step-by-step explanation:
You need to find two numbers that multiply to be - 20 but add up to be - 1.
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