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f(x) = 2x²+3x-2
= 2(0²)+3(0)-2
= -2
jadi titik potong dg sumbu y adalah (0,-2)
titik potong deng sm-Y .... x=0
fx=2x²+3x-2 = 2. 0+3. 0-2=-2 atau titik pot (0,-2)
titik potong dengan sb-x...y=0
(2x-1)(x+2)=0 .... x= 1/2 dam x=-2
x=1/2
y=2 (1/2)² +3 (1/2)-2=0 .. (1/2, 0 )
x=-2
y= 2(-2)²+2(-2)-2= 2 (-2,2)