Respuesta :
Answer:
978
Step-by-step explanation:
y= -x²+ 78x - 543
y= ax²+ bx + c
a= -1, b= 78, c= -543
max = c -(b²/4a)
= -543 -(78²/-4)
= -543 + 1521
= 978
Answer:
978
Step-by-step explanation:
i checked the anser and it is correct, just want to make sure it's correct :)