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Paco
22 December, 07:11
Factor completely c^2 + 6c + 9
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Courtney Buchanan
22 December, 10:05
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The factored form is (c + 3) ^2, or (c + 3) (c + 3).
In it's current state, this trinomial is not factorable using the GCF.
Knowing the squares of binomials rule, we could apply this here, but I'd rather try splitting the middle term.
Squares of binomials rule:
(a + b) ^2 = (a^2 + ab + c^2)
Knowing this rule, we can automatically surmise that our factored form is
(c + 3) ^2, but let's also factor by splitting the middle term.
Check factors of 9
3 * 3
These digits satisfy the criteria.
Split the middle term.
c^2 + 3c + 3c + 9
(Because the leading coefficient is 1, we know the factors are just going to be (c + 3) (c + 3) or (c + 3) ^2)
Factor by grouping.
c (c + 3) + 3 (c + 3)
(c + 3) (c + 3)
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