Question

A) (yx+2a)(yx-2a) B) (yx+2a)(yx+2a) C) (x+a)(y-2) D) (y+a)(x-2)

Answer 1

$a)x {}^{2} y {}^{2} - 4a {}^{2}$
$b)(yx + 2a) {}^{2}$
$c)xy - 2x + ay - 2a$
$d)xy - 2y + 4ax - 2a$