Question

Javier simplified the expression below. Find and

describe the three mistakes he made.
20x
- (203) = (5x®]* _ 5x * to
(5x®)» (20x)} – 20.x* *4

Answer 1

Explanation:

Javier did not raise the coefficients to the third power

When Javier raised
`x` to the third power, he wrote that
`(x^1)^3=x^4`, but it equals
`x^3`.

In the last step, Javier divided the exponents. He should have used the quotient of powers property and subtracted them.