F(x)=(a-1)X^2+(a-2)x+a melalui titik (1,7) dan memotong sumbu x di (p,0) dan (q,0) maka nilai p+q=

F(x) = (a-1)x² + (a-2)x + a
melalui (1,7)
f(1) = 7 –>  a-1 + a – 2 + a = 7
3a = 10
a = 10/3

y = (a-1)x² + (a-2)x + a
y = (10/3 – 1)x² + (10/3 – 2)x + (10/3)
y = (7/3) x² + (4/3) x + (10/3)
a = 7/3 , b = 4/3 , c= 10/3

memotong sumbu x  di(p,0) dan (q,0) –> p dan q adalah akar  akrnya
p + q = – b/a   = – (4/3) /(7/3)
p + q = – 4/7