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How do i make this expression a perfect square? y^2-18y+
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How do i make this expression a perfect square? y^2-18y+

User Aafulei
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1 Answer

2 votes
take 1/2 of liear coefient, and square it

-18/2=-9, (-9)^2=81
add 81
factors to (y-9)²
User Randy Swanson
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