Finding+the+vertex+by+b+over+2a++Set+3

 y = 4x²+30x-16

y = 6x²+ -30x +36

y = x^4+50x^2+625.

Answer: a) //-b/2a// -30/8 --> **x = -3.75** y = 4(-3.75)² + 30(-3.75) - 16 y = 56.25 - 112.5 -16 (-7.5, 28.75)** incorrect correct answer is (-3.75,-72.25) b) 30/12 --> **x = 2.5** y = 6(2.5)² - 30(2.5) + 36 y = 37.5 - 75 +36 (2.5, -1.5)** correct c) -50/2 --> **x = -25** y = 1(-25)^4 + 50(-25)² +625 y = 390625 + 31250 + 625 (-25,** **422,500****)** correct -Erica
 * y = 28.75
 * y = -1.5
 * y = 422,500