Ola Alex
3*12x - x² + 5x² = x² + 7
3x² + 36x - 7 = 0
delta
d² = 36² + 12*7 = 1380
d = 2*√345
x1 = (-36 + 2√345)/6 = (-18 + √345)/3
x2 = (-36 - 2√345)/6 = (-18 - √345)/3
pronto
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Ola Alex
3*12x - x² + 5x² = x² + 7
3x² + 36x - 7 = 0
delta
d² = 36² + 12*7 = 1380
d = 2*√345
x1 = (-36 + 2√345)/6 = (-18 + √345)/3
x2 = (-36 - 2√345)/6 = (-18 - √345)/3
pronto