Which of these functions has a maximum y-value of 2? A. y= 2(x + 1)2 + 3
B. y=3(x + 1)2 + 2
C. y = -3(x + 1)2 + 2
D. y=-(2x - 2)2 + 3

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

25 ! i need asap! ! ill mark brainliest!

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25