kuis kls A
1.a. Rumus y-y1
= m (x-x1)
Sehinggaà y-(-3) = 2 (x-5)
Y + 3 = 2x –
10
Y = 2x – 13 atau
Y -2x = 2 atau
2x = y = 13
b. A (-2,1) dan B (3,2)
5(y – 1)=1(x+2)
5y – 5= 1 x + 2
5 y = 1 x + 2 - 5
Y = 1 x - 3
Y = 1 x -3 / 5
2. a. 3x + 2y = 5
b. -4x + y = 10
Eliminasi
3x + 2y = 5
-4x + y = 10 x 2
3x + 2y= 5
-8x+2y=20 -
-11x = 25
X = 25
X =2,27
3x+2y=5
-8x + 2y =5
-8(2,27)+2y=5
-18,6+ 2y=5
2y =5-18,6
2y = 23.13/2
Y=11.565
Subsitusi
A : 3x+2y=5
2y = 5+3x
Komentar
Posting Komentar