Question

Ррозв'яжи систему рівнянь
4x + y = 2
2x2 - 3xy = 44 ​

Answer 1

$\left \{ {{4x + y = 2} \atop { {2x}^{2} - 3xy = 44}} \right. \\ \left \{ {{y = 2 - 4x} \atop { {2x}^{2} - 3x = 44 }} \right. \\ {2x}^{2} - 3x \times (2 - 4x) = 44 \\ x = - \frac{11}{7} \\ x = 2 \\ y =2 - 4 \times ( - \frac{11}{7} ) \\ y = 2 - 4 \times 2 \\ y = \frac{58}{7} \\ y = - 6 \\ ( x _{1} \: ; \: y_{1}) = ( - \frac{11}{7} \: ; \: \frac{58}{7} ) \\ ( x_{2} \: ; \: y_{2}) = (2 \: ; \: - 6)$