Solve this factories
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Here is your solution.. Thanks
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Step-by-step explanation:
x=−1 satisfies the cubic equation: x³−3x²−9x−5=0 hence from factor theorem, x+1 is a factor of x³−3x²−9x−5
∴x³−3x²−9x−5
=x²(x+1)−4x(x+1)−5(x+1)
=(x+1)(x²−4x−5)
=(x+1)(x²−5x +x−5)
=(x+1)(x(x−5)+(x−5))
=(x+1)(x−5)(x+1)
=(x−5)(x+1)²
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