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Mathematics
Devin Nixon
29 December, 11:56
Factor this quadratic expression:
a2 - 2a - 15
+4
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2
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Julianne Alexander
29 December, 13:00
0
A^2-2a-15
1. Ask: Which two numbers add up to - 2 and multiply to - 15?
-5 and 3
2. Rewrite the expression using the above
(a-5) (a+3)
Have a nice day : D
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Kendall Bean
29 December, 14:33
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A² - 2a - 15
= a² - 5a + 3a - 15
= a (a-5) + 3 (a-5)
= (a-5) (a+3)
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