Simplify 3x^2+5x-7(x^2+4)

$3 x^{2} + 5 x - 7 (x^{2} + 4)$

Step 1

Simplify each term.

Apply the distributive property.

$3 x^{2} + 5 x - 7 x^{2} - 7 \cdot 4$

Multiply $- 7$ by $4$ .

$3 x^{2} + 5 x - 7 x^{2} - 28$

$3 x^{2} + 5 x - 7 x^{2} - 28$

Step 2

Subtract $7 x^{2}$ from $3 x^{2}$ .

$- 4 x^{2} + 5 x - 28$

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