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Solve the following mathematical problems:

Factorize: x3-21x+20

(Equation)

dsuc.created: 2 years ago | dsuc.updated: 1 year ago
dsuc.updated: 1 year ago

Given, x3-21x+20 let, f(x)=x3-21x+20 Here, if x=1, then f(x) = 0  (x-1) will be the factor of f(x) x3-21x+2 =x3-x2+x2-x-20x+20 =x2(x-1)+x(x-1)-20(x-1) =(x-1)(x2+x-20) =(x-1)(x2+5x-4x-20) =(x-1){(x(x+5)-4(x+5)} =(x-1) (x+5) (x-4) (answer)

1 year ago

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