Salah satu garis kurva y= x2+10x+25 dititik yang berordinat 4 memotong sumbu y dititik​

y = x² + x – 2

4 = x² + x – 2

x² + x – 6 = 0

(x + 3)(x – 2) = 0

x = – 3 atau x = 2

y' = 2x + 1

utk x = – 3 ⇒ y' = m = -5

PGS nya:

y – 4 = – 5(x + 3)

y = – 5x – 11

utk x = 2 ⇒ y' = 5

PGS nya:

y – 4 = 5(x – 2)

y = 5x -6