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Solve for C
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Solve for x (complex solution)
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C=9x^{2}-6x+1+21x^{2}-7x
Use the distributive property to multiply 7x by 3x-1.
C=30x^{2}-6x+1-7x
Combine 9x^{2} and 21x^{2} to get 30x^{2}.
C=30x^{2}-13x+1
Combine -6x and -7x to get -13x.