Factorise: x^3+5x^2-4x-20 by using factor theorem
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Step-by-step explanation:
Find common root between the factors which will give back the original cubic equation check it with x= ±1,±2,±3.......
Here, x+2 is coming as a factor of this equation
x^2(x+2)+3x(x+2)-10(x+2)=0
(x+2)(x^2+3x-1)=0
x= -2 is a root of the equation
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