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Resolver x (complex solution)
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y=x^{2}-30x+225-1
Usar teorema binomial \left(a-b\right)^{2}=a^{2}-2ab+b^{2} para expandir \left(x-15\right)^{2}.
y=x^{2}-30x+224
Resta 1 de 225 para obter 224.