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Mathematics
Akira
10 July, 17:58
Y square - y - 20 (factorisation)
+5
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1
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Aditya Rhodes
10 July, 19:02
0
(y - 5) (y + 4)
Step-by-step explanation:
Given
y² - y - 20
Consider the factors of the constant term ( - 20) which sum to give the coefficient of the y - term ( - 1)
The factors are - 5 and + 4, since
- 5 * 4 = - 20 and - 5 + 4 = - 1, thus
y² - y - 20 = (y - 5) (y + 4) ← in factored form
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