Question

спростіть вираз 2x (1/2x+1/4y)-4x(x+1/8y)

Answer 1

$2x \times \frac{1}{2} x + 2x \times \frac{1}{4} y - {4x}^{2} \\ - 4x \times \frac{1}{8} y =$
${x}^{2} + \frac{1}{2} xy - 4 {x}^{2} - \frac{1}{2} xy = - {3x}^{2}$