Answer:
2x^2+9x-5
Step-by-step explanation:
(X+5)(x-1/2)
x^2-1/2x+5x-5/2
x^2+9/2x-5/2
multiply through by 2
2x^2+9x-5
B. because you are still multipying they just broke it down (7*24)= 168 , and b also = 168
So the expression is:

You can combine like terms, which are terms that contain the same variables raised to the same power. That means you can combine the two

.

The other terms can't be combined.
Your final answer should be

.
4+5=9 divided by 3 is 3 times 4 is 12. so it's 12
hope this helps;)
Just go through it phrase by phrase by phrase - one step at a time.
2*( )
2*(x - 7)