tolong di bantu, pakai cara penyelesaian nya

4. Sumbu simetri
x = -b/2a
x = -1/2.(-1)
x = 1/2

5. x = -b/2a
x = -(-8)/2.2
x = 2

y = 2x²-8x-24
y = 2(2)² - 8(2) - 24
y = 8 - 16 - 24
y = -32

(x,y) = (2,-32)

6. y = 5x²-20x+1
y' = 10x-20
20 = 10x
2 = x

y = 5x²-20x+1
y = 5(2)²-20(2)+1
y = 20-40+1
y = -19