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y = 4( x²+ 4x) - 5
y = 4 (x+2)² - 21
p= 4, h = 2, k = -21
phk = -168
y = 4x² + 16x + 16 - 21
y = 4(x² + 4x + 4) - 21
y = 4(x + 2)² - 21
Maka ;
p = 4
h = 2
k = - 21
p + h + k = 4 + 2 + (-21)
p + h + k = - 13