Datrys ar gyfer C
C=-3\left(3x-5\right)\left(x+3\right)
Datrys ar gyfer x (complex solution)
x=\frac{-\sqrt{49-C}-2}{3}
x=\frac{\sqrt{49-C}-2}{3}
Datrys ar gyfer x
x=\frac{-\sqrt{49-C}-2}{3}
x=\frac{\sqrt{49-C}-2}{3}\text{, }C\leq 49
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Rhannu
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C=49-\left(4+12x+9x^{2}\right)
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(2+3x\right)^{2}.
C=49-4-12x-9x^{2}
I ddod o hyd i wrthwyneb 4+12x+9x^{2}, dewch o hyd i wrthwyneb pob term.
C=45-12x-9x^{2}
Tynnu 4 o 49 i gael 45.
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