Question

Please help me I don’t understand anything about this

Answer 1

2x/x+7

Explanation:

1. combine them together getting

2x^2-6x/x^2+4x-21

2. factor the top and bottom

2x(x-3) / (x-3)(x+7)

3. then cancel out the x-3

Answer 2

B

Explanation:

It can be crossed if sides are same in multiply, as shown in the answer