展開する (2(a-mc+ne)+mr(e-l))r(e-l)

解

展開する

(2 (a - m c + n e) + m r (e - l)) r (e - l)

2 e a r - 2 e m cr + 2 e^{2} n r - 2 a l r + 2 l m cr - 2 e l n r + e^{2} m r^{2} - 2 e l m r^{2} + l^{2} m r^{2}

解答ステップ

(2 (a - m c + n e) + m r (e - l)) r (e - l)

= r (2 (a - m c + e n) + m r (e - l)) (e - l)

拡張

(2 (a - m c + n e) + m r (e - l)) (e - l) : 2 e a - 2 e m c + 2 e^{2} n - 2 a l + 2 l m c - 2 e l n + e^{2} m r - 2 e l m r + l^{2} m r

= r (2 e a - 2 e m c + 2 e^{2} n - 2 a l + 2 l m c - 2 e l n + e^{2} m r - 2 e l m r + l^{2} m r)

拡張

r (2 e a - 2 e m c + 2 e^{2} n - 2 a l + 2 l m c - 2 e l n + e^{2} m r - 2 e l m r + l^{2} m r) : 2 e a r - 2 e m cr + 2 e^{2} n r - 2 a l r + 2 l m cr - 2 e l n r + e^{2} m r^{2} - 2 e l m r^{2} + l^{2} m r^{2}

= 2 e a r - 2 e m cr + 2 e^{2} n r - 2 a l r + 2 l m cr - 2 e l n r + e^{2} m r^{2} - 2 e l m r^{2} + l^{2} m r^{2}