X² + 2bx - 3 = 0
3² + 2b * 3 - 3 = 0
9 + 6b - 3 = 0
6b = - 6
b = - 1
x² - 2x - 3 = 0
D = ( - 2)² - 4 * 1 * ( - 3) = 4 + 12 = 16 = 4²
Ответ: b = - 1 , x₂ = - 1
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2х^2+3х-2=0
д=9-4×2×(-2)=25
х1=(-3-5)/2×2=-2
х2=(-3+5)/2×2=0.5
В числителе у(х+3у) в знаменателе 6