Ответы на вопрос:
4x^2+6x-2=(x-1)^2
4x^2+6x-2 = x^2 - 2x+1
4x^2-x^2+6x+2x-2-1 = 0
3x^2+8x-3 = 0
d = 64+36 = 100
x1 = -8+10 / 6 = 1
__
3
x2 = -8-10/6 = -3
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