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Krish Gillespie
Mathematics
8 April, 13:13
X² + 4x + 2x+8
how do i factor this
+1
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1
)
Eleanor Roach
8 April, 13:28
0
(x+2) (x+4)
Step-by-step explanation:
First, start by combing like terms so that you end up with x^2 + 6x + 8
Now, we have to come up with two factors of this equation
(x + a) (x + b) = x^2 + 6x + 8
we know that ab = 8 and that a+b = 6. In other words, what factors of 8 have a sum of 8? We can find out that 2 and 4 fit these criteria.
a = 2
b = 4
2 (4) = 8? 2 + 4 = 6?
8 = 8 6 = 6
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