What is expand (x+5)(x+4)(x-1) ?

The solution to expand (x+5)(x+4)(x-1) is x^3+8x^2+11x-20

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expand (x+5)(x+4)(x-1)

expand

(x + 5) (x + 4) (x - 1)

x^{3} + 8 x^{2} + 11 x - 20

Solution steps

(x + 5) (x + 4) (x - 1)

Expand

(x + 5) (x + 4) (x - 1) : (x^{2} + 9 x + 20) (x - 1)

= (x^{2} + 9 x + 20) (x - 1)

Distribute parentheses

= x^{2} x + x^{2} (- 1) + 9 xx + 9 x (- 1) + 20 x + 20 (- 1)

Simplify

x^{2} x + x^{2} (- 1) + 9 xx + 9 x (- 1) + 20 x + 20 (- 1) : x^{3} + 8 x^{2} + 11 x - 20

= x^{3} + 8 x^{2} + 11 x - 20

\frac{3}{10} \div \frac{- 1}{3}

x^{4} - 15 x^{2} - 10 x + 24

(x + 7) (3 x - 9)

d x^{3} x

\frac{1}{2} (x - 4)

What is expand (x+5)(x+4)(x-1) ?
The solution to expand (x+5)(x+4)(x-1) is x^3+8x^2+11x-20