Question

Simplify the expression.
-20a-2b-7
5a-5b3

Answer 1

(-20a+2b-7, 5a+5b^3)

Explanation:

Use vector arithmatic to simplify

Answer 2

`(-4a^3)/(b^(10) )`

Explanation:

Step 1: Write out the expression separately. Like so:

-20
`a^(-2)`
`b^(-7)` 5
`a^(-5)`
`b^(3)`

Step 2: Since the it's a fraction were dividing. The bases of the exponents are the same, so you can divide the numbers and subtract the exponents.

-20 ÷ 5 = -4

`a^(-2)` -
`a^(-5)` =
`a^(3)`

`b^(-7)` -
`b^(3)` =
`b^(-10)`

Step 3: Notice that there is a negative exponent. To get rid of the negative, you have to make it positive and move it from being the numerator to being the denominator.

`b^(-10)` →→→
`b^(10)`

Step 4: Rewrite the expression with the -4,
`a^(3)` , and
`b^(10)`.

`(-4a^(3) )/(b^(10) )`

hope this helps :)