Question

9. Describe and correct the error in performing the operation.

X 4x²(3x - 2x² + 7) = 12x³ - 8x + 28x²

Answer 1

12
`x^(3)`-8
`x^(4)`+ 28
`x^(2)`

Explanation:

the second term should not be -8x, it should be -8
`x^(4)`

The product of powers principle tells us that when we are multiplying powers with the same bases, we add the exponents. 4
`x^(2)`(2
`x^(2)`) is 8 but then we add the exponents 2 + 2 = 4