Question 341796
TO solve this you have to foil. First, outside, inside, last.
(w-7) (w+3)
first: w * w = w^2 
outside: w * 3 = w3
inside: w * -7 = -7w
last -7 * 3 = -21

so:  w^2 + 3w - 7w - 21 


Hope this helps. Good Luck!