Evaluate (-10x^2+9x)-(-6x+4)

$(- 10 x^{2} + 9 x) - (- 6 x + 4)$

Simplify each term.

Apply the distributive property.

$- 10 x^{2} + 9 x - (- 6 x) - 1 \cdot 4$

Multiply $- 6$ by $- 1$ .

$- 10 x^{2} + 9 x + 6 x - 1 \cdot 4$

Multiply $- 1$ by $4$ .

$- 10 x^{2} + 9 x + 6 x - 4$

$- 10 x^{2} + 9 x + 6 x - 4$

Add $9 x$ and $6 x$ .

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

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