ICantMath ICantMath

03-10-2018
Mathematics

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What number needs to be added to both sides of the equation to complete the square?
x^2-9x=8

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jimrgrant1 jimrgrant1

03-10-2018

[tex]\frac{81}{4}[/tex]

since the coefficient of the x² term is 1 then add

([tex]\frac{1}{2}[/tex] the coefficient of the x-term )² to both sides

x² + 2(- [tex]\frac{9}{2}[/tex] )x + [tex]\frac{81}{4}[/tex] = 8 + [tex]\frac{81}{4}[/tex]

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