Question

bm^ 2 +by^ 2 -cm^ 2 -cy^ 2 =​

Answer 1

Explicación paso a paso:

$b {m}^{2} + b {y}^{2} - c {m}^{2} - c {y}^{2}$

$(b {m}^{2} - c {m}^{2} ) + (b {y}^{2} - c {y}^{2} )$

${m}^{2} (b - c) + {y}^{2} (b - c)$

$(b - c)( {m}^{2} + {y}^{2} )$