Selesaikan persamaan berikut dengan cara pengfaktoran
a). 2x²-x=3
b). 20+11x-4x²=0
a). 2x²-x=3
b). 20+11x-4x²=0
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2x²-x = 3
2x²-x-3 = 0
(2x-3).(x+1) = 0
2x-3 = 0
2x = 3
x = 3/2
x = 1 1/2
atau
x+1 = 0
x = -1
b)
20x²+11x-4x² = 0
(4x-x).(5x+4x) = 0
4x-x = 0
3x = 0
x = 0/3
x = 0
atau
5x+4x = 0
9x = 0
x = 0/9
x = 0