Step-by-step explanation:
Answer:
The difference of two squares occurs when the middle term or "b" of your polynomial is absent. so the the "c" term would have to be the product of a single number, one positive and one negative. if c = 3 then x2 - 9 = 0 factors to (x+3)(x-3) = 0 and so on.
Step-by-step explanation:
A.) 1
Type it in your calc. to find
I believe it is 1.5 pounds each as 13 1/2=13.5
13.5/9=1.5