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x² =5 ...x =+/-√5
2. (x-3)²=x+1
x²-6x+9=x+1
x² -7x +8=0
(x-3/2)² - 9/4+8 =0
(x-7/2)² - (49 - 32)/4=0
(x-7/2)² = 17/4
x-7/2 = +/- 1/2√17
x1= 7/2 + 1/217
x2= 7/2-1/2√17
3. (X-2) (x+1)= 2(x+3)
x² _x -2= 2x+6
x²-3x -8=0
gunakan rumus ABC
4. 1/x-2 + 1/x-1=1.
x-1 + x-2=(x-2)(x-1)
2x-3 = x² -3x +2
x² -5x +5=0
gunakan rumus ABC
x12 = (5+/- √(25-4.5))/2 = (5+/-√5)
x1= 5/2 + 1/2 √5
x2 = 5/2- 1/2√5