Question

Решите уравнение, пожалуйста

Answer 1

$\displaystyle\\\frac{8x^2-3}{5} -\frac{5-9x^2}{4} =2|\times20\\\\4(8x^2-3)-5(5-9x^2)=40\\32x^2-12-25+45x^2=40\\77x^2=77\\x^2=1\\x_{1,2}=\pm1$