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03-03-2018
Mathematics

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If c is a constant such that 9x^2+10x+c is equal to the square of a binomial, then what is c?

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03-03-2018

(9x^2+10x+c) = (3x+b)^2
= 9x^2 + 6b x+ b^2

1) 6b= 10
b+ 5/3

2) c=b^2
c= (5/3) ^2
c= 25/9

(9x^2+10x+25/9)=(3x+5/3)^2

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