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13-11-2018
Mathematics

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what number must you add to complete the square
x^2+x

A. 1/2
B. 2
C. 1/4
D. 1

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apologiabiology apologiabiology

13-11-2018

for [tex]ax^2+bx+c[/tex]

when a=1, then the value of c that will make the quadratic a perfect square (allows you to complete the square) is [tex](\frac{b}{2})^2[/tex]

given x^2+x

b=1

so [tex]c=(\frac{1}{2})^2=\frac{1}{4}[/tex]

answer is C

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