2) h(x)=ax + b. h(5)=16 dan h(4)=11. h(-1) ? h(5) = 5a + b = 16 h(4) = 4a + b = 11 -------------------- - a = 5 4a + b = 11 4(5) + b = 11 b = 11-20 b = -9
h(-1) = 5.-1 + (-9) = -5-9 =-14
3) 8x + 3y=59 dan 2x-6y=-46, maka nilai 5x + 2y adalah... 8x + 3y = 59 x2 2x - 6y = -46 x1
3x^2 - 15x - x + 5
3x(x- 5)-1(x-5)
(3x-1)(x-5)
x=1/3 x=5
2) h(x)=ax + b. h(5)=16 dan h(4)=11. h(-1) ?
h(5) = 5a + b = 16
h(4) = 4a + b = 11
-------------------- -
a = 5
4a + b = 11
4(5) + b = 11
b = 11-20
b = -9
h(-1) = 5.-1 + (-9)
= -5-9
=-14
3) 8x + 3y=59 dan 2x-6y=-46, maka nilai 5x + 2y adalah...
8x + 3y = 59 x2
2x - 6y = -46 x1
16x + 6y = 118
2x - 6y = -46
----------------- +
18x = 72
x = 4
2x - 6y = -46
2.4 - 6y = -46
-6y = -46-8
-6y = -54
y = 9
5x + 2y
5(4) + 2(9) = 20 + 18
= 38