3x^2-24x-21 would be your answer
Answer:b
Step-by-step explanation:
There are lots of videos on YouTube on how to do it I’m not completely sure so I don’t want to tell you something false
I think it is 25650
I read the quistion carefully
Theres a formula to find the midpoint it’s... (x1+x2)/2, (y1+y2)/2. You fill in the x’s and y’s to get (-5+7)/2 for x, which equals 1 and (4-5)/2 to get -0.5. (1, -0.5) is your answer