Question

4x al cuadrado menos 2xy mas y al cuadrado sobre 4

Answer 1

Recuerda que:

${a}^{2} - 2ab + {b}^{2} = {(a - b)}^{2}$

...

$= 4 {x}^{2} - 2xy + \frac{ {y}^{2} }{4} \\ = {(2x)}^{2} - 2 \times 2x \times \frac{y}{2} + {( \frac{y}{2} )}^{2} \\ = {(2x - \frac{y}{2}) }^{2}$