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factor completely 20x^2+100x+125
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First pull out the common factor 5
ok then whats next
Multiply 4 times 25 and try to think of factors of 100 whose sum is 25
i dont think there is one
What is 5 x 20?
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1oo
What is 5 + 20?
oh okay my apologies
Whoops. Should have been factors of 100 who sum is 20 so that would be 10 and 10. Replace 20x with 10x+10x and factor by grouping.
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