bagaimana cara mengerjkannya pakai cara

Mapel : Matematika
Bab : Persamaan Garis Lurus

P = (1,6) dan
B = (2,-1)

y - y1/y2 -y1 = x - x1/x2 - x1

y - 6 / -1 - 6 = x - 1/2 - 1

y - 6 / -7 = x - 1/1

y - 6 = -7(x - 1)

y - 6 = -7x + 7

y = -7x + 7 + 6

y = -7x + 13


(a + 1,-5a)

masukkan

y = -7x + 13

-5a = -7(a + 1) + 13

-5a = -7a - 7 + 13

-5a = -7a + 6

-5a + 7a = 6

2a = 6

a = 6/2

a = 3



(A)



Semoga Membantu