Question

Tentukan persamaan garis tegak lurus 2y+2=-7/4 (x-7) dan mlalui titik (-2,-3)

Answer 1

2y+2=-7/4(x-7)
2y=-7/4x+49/4-2
--------------------------kalikan 4
8y=-7x+49-8
8y=-7x+41
y=-7/8x+41/8-----------ingat y=mx+c m adalah gradiennya,maka gradien =-7/8

tegak lurus
m1.m2=-1
-7/8.m2=-1
m2=-1.-8/7
m2=8/7

y-y1=m(x-x1)
y-(-3)=8/7(x-(-2)
y=8/7x+16/7-3
-----------------------kalikan 7
7y=8x+16-21
7y=8x-5