rpambudi12
1. (x-7) (x+1) x = 7 V x = -1 2. (x-3) (x+1) x = 3 V x = -1 3. (2x-5) (x+1) x = 5/2 V x = -1 4. (3x+7) (x-1) x = -7/3 V x = 1 5. (2x-1) (2x-1) x = 1/2 6. (5x-3) (x-1) x = 3/5 V x = 1 7. (3x+2) (2x+3) x = -2/3 V x = -3/2
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hendrisyafa
1) x²-7x+x-7 =0 x(x-7) + (x-7) = 0 (x-7) (x+1) =0 x-7 = 0 dan x+1 = 0 x = 7 x = -1
x = 7 V x = -1
2. (x-3) (x+1)
x = 3 V x = -1
3. (2x-5) (x+1)
x = 5/2 V x = -1
4. (3x+7) (x-1)
x = -7/3 V x = 1
5. (2x-1) (2x-1)
x = 1/2
6. (5x-3) (x-1)
x = 3/5 V x = 1
7. (3x+2) (2x+3)
x = -2/3 V x = -3/2
x(x-7) + (x-7) = 0
(x-7) (x+1) =0
x-7 = 0 dan x+1 = 0
x = 7 x = -1
2) x²-2x-3 = 0
x²-3x+x-3 = 0
x(x-3) + (x-3) = 0
(x-3) (x+1) = 0
x-3 = 0 dan x+1 = 0
x= 3 x = -1
3) 2x²-3x-5 = 0
2x²-5x+2x-5
x(2x-5)+ (2x-5) = 0
(2x-5) (x+1) = 0
2x-5 = 0 dan x+1 = 0
2x = 5 x = -1
x = 5/2
4) 3x²+4x-7 = 0
3x²+7x-3x-7 = 0
x(3x+7) - (3x+7) = 0
(3x+7) (x-1) = 0
3x+7 = 0 dan x-1 = 0
3x = -7 x = 1
x = -7/3
5) 4x²-4x+1 = 0
4x²-2x-2x+1 = 0
2x (2x-1) - (2x-1) = 0
(2x-1) (2x-1) = 0
2x-1 = 0
2x = 1
x = 1/2
6) 5x²-8x+3 = 0
5x²-5x-3x+3 = 0
5x(x-1) - 3(x-1) = 0
(5x-3) (x-1) = 0
5x-3 = 0 dan x-1 = 0
5x = 3 x = 1
x = 3/5
7) 6x²+13x+6 = 0
6x²+9x+4x+6 = 0
3x (2x+3)+2(2x+3) = 0
(3x+2) (2x+3) = 0
3x+2 = 0 dan 2x+3 = 0
3x = -2 2x = -3
x = -2/3 x = -3/2