What is expand (4x+5)(x^2-x-4) ?

The solution to expand (4x+5)(x^2-x-4) is 4x^3+x^2-21x-20

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expand (4x+5)(x^2-x-4)

expand

(4 x + 5) (x^{2} - x - 4)

4 x^{3} + x^{2} - 21 x - 20

Solution steps

(4 x + 5) (x^{2} - x - 4)

Distribute parentheses

= 4 x x^{2} + 4 x (- x) + 4 x (- 4) + 5 x^{2} + 5 (- x) + 5 (- 4)

Simplify

4 x x^{2} + 4 x (- x) + 4 x (- 4) + 5 x^{2} + 5 (- x) + 5 (- 4) : 4 x^{3} + x^{2} - 21 x - 20

= 4 x^{3} + x^{2} - 21 x - 20

\frac{0}{- 6}

(4 x - y) (4 x + y)

(2 n + 1)^{2}

7 \frac{2}{3}

23 + 73

What is expand (4x+5)(x^2-x-4) ?
The solution to expand (4x+5)(x^2-x-4) is 4x^3+x^2-21x-20