Question

calculati(2x+y) la puterea 2-(2x-y) la puterea 2

Answer 1

${(2x + y)}^{2} - {(2x - y)}^{2}$
Ai doua metode: ori desfaci fiecare binom in parte fie folosesti formula:
${x}^{2} - {y}^{2} = (x - y)(x + y)$
$((2x + y) - (2x - y))(2x + y + 2x - y) \\ (2x + y - 2x+ y) \times 4x \\ 2y \times 4x \\ 8xy$