Solve for C
C=-3\left(3x-5\right)\left(x+3\right)
Solve for x (complex solution)
x=\frac{-\sqrt{49-C}-2}{3}
x=\frac{\sqrt{49-C}-2}{3}
Solve for x
x=\frac{-\sqrt{49-C}-2}{3}
x=\frac{\sqrt{49-C}-2}{3}\text{, }C\leq 49
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C=49-\left(4+12x+9x^{2}\right)
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(2+3x\right)^{2}.
C=49-4-12x-9x^{2}
To find the opposite of 4+12x+9x^{2}, find the opposite of each term.
C=45-12x-9x^{2}
Subtract 4 from 49 to get 45.
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Simultaneous equation
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Integration
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Limits
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