Řeš v ℝ rovnice:
\large \left( 3 x\right) ^{2}-x+2=2\left( x^{2}-x\right) +7 {x^{2}}+5
\large K = \left \{ 0 \right \}
\large K = \left \{ 2 \right \}
\large K = \left \{ 3 \right \}
\large K = \left \{ -3 \right \}
