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1 vote
5x​2​​−320 factored completely?

User Cancan
by
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2 Answers

4 votes
First factor out the 5 so you have 5(x2-64). Since (a+b)(a-b)=(a^2-b^2)
(x^2-64)=(x-8)(x+8). So completely factored is 5(x-8)(x+8).
User Helen Toomik
by
8.0k points
3 votes
First take out the GCF (5)
5(x^2-64)
It's a perfect square so we can go further
5(x+8)(x-8)
User Alexey Primechaev
by
7.9k points
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