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

The solution to 4x(5x-2)-(x+2) is 20x^2-9x-2

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simplify 4x(5x-2)-(x+2)

simplify

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

20 x^{2} - 9 x - 2

Solution steps

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

Apply the distributive law:

- (a + b) = - a - b

- (x + 2) = - x - 2

= 4 x (5 x - 2) - x - 2

Expand

4 x (5 x - 2) : 20 x^{2} - 8 x

= 20 x^{2} - 8 x - x - 2

Add similar elements:

- 8 x - x = - 9 x

= 20 x^{2} - 9 x - 2

(0 - x)^{2}

- 4 (u + 5) + 5 u

- 18 - 14

7 (x + h)^{2}

x^{2} (x^{\frac{1}{2}})