Hello i hope you are having a good day :) your Question : -4x(3x^2 - 7x + 8x)
Answer : − 12 x^2 + 28 x − 32
Step to step :
1) -4x times 3x^2 = 12 it would be a negative because a negative x and positive equal a negative. Then just add the ^2.
2) -4x times -7x = 28x it would be a positive because a negative and a negative equal to a positive.
3) -4x times 8x = -32 it would be a negative because a negative and a positive equal a negative.
4) Then put it all together equal − 12 x^2 + 28 x − 32.
Hopefully that helps ya ❤