SOLUTION: If (3x+5)^2=ax^2+bx+c, what is the value of a+b+c?

Question 1032864: If (3x+5)^2=ax^2+bx+c, what is the value of a+b+c?
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
(1) Simplify the left side through multiplication and combining like-terms.
(2) Equate the corresponding coefficients.
Answer by ikleyn(52787) (Show Source): You can put this solution on YOUR website!
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If (3x+5)^2=ax^2+bx+c, what is the value of a+b+c?
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Substitute x=1 into left side and calculate.

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