Question

Решите уравнение 3х^2 - 2х-5 = 0

Answer 1

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Answer 2

$3 x^2 -2 x -5=0 \a= 3; b=-2; c=-5; \D=b^2-4ac \D= 64 = 8^2\x_{1}=frac{ 2-sqrt{ 64 }}{ 2*3 } = frac{ 2-8 }{ 6 }=-1;\\x_{2}=frac{ 2+sqrt{ 64 }}{ 2*3 } = frac{ 2+8 }{ 6 }=1.6$