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x2 = 4
persamaan kuadrat baru adalah
(x-x1)(x-x2)=0
(x-3/2)(x-4)=0
x²-4x-3/2x+6=0
x²-11/2x +6 =0 (sama2 dikali 2)
2x²-11x +12=0
b. x1=3/4
x2 = 7
persamaan kuadrat yang baru adalah:
(x-x1)(x-x2) =0
(x-3/4)(x-7) =0
x²-7x-3/4x + 21/4 = 0
x²-31/4x + 21/4 =0 (sama2 dikali 4)
4x²-31x + 48 =0