What factor is common between -2, 28, and -26? (Yes, take the "minus" sign, too; it'll make the rest easier.)3. Express y= -2x^2 + 28x-26 in factored form
To put this into "y = a(x - h)2 + k" form, you'll need to complete the square.6. Express y= -9x^2 + 72x +81 in vertex form
Try slowing down and doing your steps more explicitly when you factor. Inside the parentheses, you've dropped an "x" and have lost track of some signs!3. -2 is the common factor? so i get -2(x^2+14-13), but i cant factor this?
First, check your factorization. It doesn't look like you took the -9 out of the 72x in the middle...?4. -9(x^2+72x)+81 but i dont knoe what to do next?