1/(x + y) – 2/(x – y) ÷ 3/(x – y) + 4/(x + y)
Jawaban
= [1(x – y) – 2(x + y)]/[(x + y)(x – y)] ÷ [3(x + y) + 4(x – y)]/[(x + y)(x – y)]
= (x – y – 2x – 2y)/(x2 – y2) ÷ (3x + 3y + 4x – 4y)/(x2 – y2)
= -x – 3y/x2 – y2 ÷ 7x – y/x2 – y2
= -x – 3y/x2 – y2 × x2 – y2/7x – y
= -x – 3y/7x – y
