28-11-2016
Mathematics

contestada

solve the equation 2x^2-7x=9

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JuanAlv89 JuanAlv89

28-11-2016

x=−1, 9/2 Decimal Form: -1, 4.5

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apologiabiology apologiabiology

28-11-2016

minus 9 from both sides
2x^2-7x-9=0
factor
(2x-9)(x+1)=0

set each to zero
2x-9=0
2x=9
x=9/2

x+1=0
x=-1

x=9/2 and -1

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