Question

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

Explanation:

Step1: Distribute $3x^2$ to each term

$3x^2 \times (-x^2) + 3x^2 \times 2x + 3x^2 \times (-4)$

Step2: Calculate each product

$-3x^{2+2} + 6x^{2+1} - 12x^2$

Step3: Simplify exponents

$-3x^4 + 6x^3 - 12x^2$

Answer:

$-3x^4 + 6x^3 - 12x^2$