polynominal 4x^2-7x-15=

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wwrff1974

Mathematics

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polynominal

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4x^2-7x-15

=4x^2-12x+5x-15                                          (12*5 =60, 12-5=7)

=4x(x-3)+5(x-3)

=(x-3) (4x+5)

x=3 or x=-5/4


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