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Find the value for c, that would make x^2-12x+c, a perfect square

Find the value for c, that would make x^2-12x+c, a perfect square
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1 vote
Find the value for c, that would make x^2-12x+c, a perfect square

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User Nishchit
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7.3k points

1 Answer

5 votes
Complete the square to find the value of this constant:
4x² + 12x + c = (2x + 3)²
4x² + 12x + c = 4x² + 12x + 9
By comparing coefficients, it is easy to see that c = 9.
answered
User Sterin
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8.1k points
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