tolong di bantu gann

jika kita jabarkan persamaan 1 menjadi A^2-B^2+2AB/ A^2-B^2, selanjutnya pada gambar... jawabannya (B) = 2/3
Semoga membantu ya gan:)

Mapel : Matematika
Kelas : VII SMP
Bab : Aljabar

Pembahasan :
A/(A - B) + B/(A + B) = 7/3
2A/(A - B) - 3B/(A + B) = 3

Misal 1/(A - B) = x dan 1/(A + B) = y

Ax + By = 7/3 —» 3Ax + 3BY = 7
2Ax - 3By = 3
——————————————— (+)
5Ax = 10
Ax = 2

Subatitusi...
Ax + By = 7/3
2 + By = 7/3
By = 7/3 - 2
By = 1/3

Maka...
Ax = 2
A/A - B = 2

By = 1/3
B/(A + B) = 1/3

Jadi...
A/(A - B) . B/(A + B) = 2 . 1/3
AB/(A² - B²) = 2/3

Opsi B.