Što je oblik vrha y = 7x ^ 2-14x-6?

Što je oblik vrha y = 7x ^ 2-14x-6?
Anonim

Odgovor:

# Y = 7 (x-2) ^ 2-13 #

Obrazloženje:

# Y = 7x ^ 2-14x-6 #

# Y + 6 = 7x ^ 2-14x #

# Y + 6 = 7 (x ^ 2-2x) #

# y + 6 + 7c = 7 (x ^ 2-2x + c) #

#c = (- 2/2) ^ 2 = 1 #

# y + 6 + 7 * 1 = 7 (x ^ 2-2x + 1) #

# 13 + y = 7 (x-2) ^ 2 #

# Y = 7 (x-2) ^ 2-13 #