Simplify 9x^2-3(x^2+x)+4y-3+2x-5

$9 x^{2} - 3 (x^{2} + x) + 4 y - 3 + 2 x - 5$

Apply the distributive property.

$9 x^{2} - 3 x^{2} - 3 x + 4 y - 3 + 2 x - 5$

Subtract $3 x^{2}$ from $9 x^{2}$ .

$6 x^{2} - 3 x + 4 y - 3 + 2 x - 5$

Add $- 3 x$ and $2 x$ .

$6 x^{2} - x + 4 y - 3 - 5$

Subtract $5$ from $- 3$ .

$6 x^{2} - x + 4 y - 8$

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