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أكتب  العبارة التالية x 2 3 − x 1 3 y 2 3 x 1 3 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca WG4bWaaWbaaSqabeaadaWcaaqaaiaaikdaaeaacaaIZaaaaaaakiab gkHiTiaadIhadaahaaWcbeqaamaalaaabaGaaGymaaqaaiaaiodaaa aaaOGaamyEamaaCaaaleqabaWaaSaaaeaacaaIYaaabaGaaG4maaaa aaaakeaacaWG4bWaaWbaaSqabeaadaWcaaqaaiaaigdaaeaacaaIZa aaaaaaaaaaaa@41DC@  في أبسط صورة .
1− y 2 3 x 1 3 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca aIXaGaeyOeI0IaamyEamaaCaaaleqabaWaaSaaaeaacaaIYaaabaGa aG4maaaaaaaakeaacaWG4bWaaWbaaSqabeaadaWcaaqaaiaaigdaae aacaaIZaaaaaaaaaaaaa@3D1E@
  x 1 3 − y 2 3 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeyypa0Jaam iEamaaCaaaleqabaWaaSaaaeaacaaIXaaabaGaaG4maaaaaaGccqGH sislcaWG5bWaaWbaaSqabeaadaWcaaqaaiaaikdaaeaacaaIZaaaaa aaaaa@3D59@
x 1 3 − y 2 3 x MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca WG4bWaaWbaaSqabeaadaWcaaqaaiaaigdaaeaacaaIZaaaaaaakiab gkHiTiaadMhadaahaaWcbeqaamaalaaabaGaaGOmaaqaaiaaiodaaa aaaaGcbaGaamiEaaaaaaa@3D6A@
x− y 2 3 x MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca WG4bGaeyOeI0IaamyEamaaCaaaleqabaWaaSaaaeaacaaIYaaabaGa aG4maaaaaaaakeaacaWG4baaaaaa@3BAB@
            
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