Y= 4-x² Y= -2x²-4x+1

y = 4 - x²
y = -2x² - 4x + 1

y = y
4 - x² = -2x² - 4x + 1
2x² - x² + 4x + 4 - 1 = 0
x² + 4x + 3 = 0
(x + 1)(x + 3) = 0
x = -1 atau x = -3

Utk x = -1
y = 4 - x² = 4 - (-1)² = 3

Utk x = -3
y = 4 - (-3)² = -5

HP = {(-1,3) , (-3,-5)}

4-x²= -2x²-4x+1
4-x²+2x²+4x-1=0
x²+4x+3 = 0
(x+3)(x+1) = 0
x+3= 0
x= -3

atau
x+1= 0
x= -1

y= 4-x²
subtitusi x= -3
y= 4-(-3)²
y= 4-9
y= -5
subtitusi y= -1
y= 4-(-1)²
y= 4-1
y= 3

hp= {(-3,-5)&(-1,3)}