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2x^+3x-7 =0
a= 2
b= 3
c= -7
alfa + beta = -b/a = -3/2
alfa . beta = c/a = -7/2
4p = X1
4q = X2
Persamaan kuadrat baru :
x^ - (X1 + X2 ) x + ( X1 . X2 ) = 0
x^ - (4p + 4q) x + (4p . 4q) = 0
x^ - [4 (p+q)] x + (16 pq) = 0
x^ - [4 (-3/2)] x + [16(-7/2)] = 0 [dikali 2]
2x^ - 12x - 112 = 0