Question

Please help?! I don't understand!

Answer 1

(Problem Number Five Answer: Simplify exponent so you get -3)
(Problem Number Seven Answer:

Step 1: Simplify brackets


`4 x^(2) y^(3) *7xy`

Step 2: Gather like terms

`4 * 7 x^(2) x y^(3) y`

Step 3: Use Product Rule
`x^(a) x^{b= x^(a+b) }`


`4* 7 x^(2+1) y^(3+1)`

Step 4: Simplify 2+1 to 3


`4*7 x^(3) y^(3+1)`

Step 5: Simplify 3 + 1 to 4

`4*7 x^(3) y^(4)`

Step 6: Simplify


`28 x^(3) y^(4)`

Done! :)
(Problem Number 9 answer: Simplify the exponent so you get -5 )