pinkster104
pinkster104
15-04-2016
Mathematics
contestada
Help! How do I factor this?
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jsblumen
jsblumen
15-04-2016
Given: [tex]5x^3-15x^2-140x[/tex]
Factor out a 5x: [tex]5x(x^2-3x-28)[/tex]
Find two numbers that multiply to -28 and add up to -3. In this case, -7 and 4: [tex]5x(x-7)(x+4)[/tex]
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taehyung04
taehyung04
17-04-2016
given <<5x^3-15x^2-140x>>
factor out everything in common
5x(x^2-3x-28)
factor polynomial within the parentheses
5x(x+4)(x-7)
Answer Link
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