Answer:
Explanation:
you have to look at the power rules
1. -2X^2(5x^2)= -10x^4
2. -7x(5x-8)=-35x^2+56
3. 3x(2x+8)=6x^2+24x
4. x(9x^2-3x+4)=9x^3-3x^2+4x^2
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