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ArbitrLikvidat [17]
3 years ago
14

Can someone help me with this? My teacher said its a must in the homework and i cant find a solution.

Mathematics
1 answer:
andrezito [222]3 years ago
5 0

Answer:

8x^3+28x^2-16x

Step-by-step explanation:

Volume of rectangular prism: l*b*h (l = length, b = breadth, h = height.)

Volume of rectangular prism:

(x+4)*(2x-1)*4x

4x\left(x+4\right)\left(2x-1\right)

Expand the two brackets using FOIL:

4x(x* \:2x+x\left(-1\right)+4* \:2x+4\left(-1\right))

4x\left(2x^2+7x-4\right)

Expand:

4x* \:2x^2+4x* \:7x+4x\left(-4\right)

8x^3+28x^2-16x

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