1 and 3

1) For 1 I used a system of equations, 4^2+4k+m=-6 and (-2)^2-2k+m=8, and solved for k and m. Next, i found the sum of k and m, which is -9.
3) The difference quotient (f(x+h)-f(x))/h, and I defined f(x)=(2x+1)^2. Next, I plugged it into my 89 and got 8x+4h+4.