Perform the indicated operation.
( x3 + 43 - 49 x - 7 x2 ) ÷ ( x2 - 49)
a) x - 7 r -300
b) x + 7 r -300
c) x - 7 r 300

A

(X^2-49)((X-7)
X^2(X)= x^3
X^2(-7)= -7x^2
-49(x)= -49x
-49(-7)= 343

X^3-7x^2-49x+343-300
X^3--7x^2-49x+43 checks with question

No he does not because he can only cover 12 square feet from 15 square feet which he will still need 3 more. this is because if 3×5=15 square feet and 15-12=3 which thats the answer