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الكرة  أوجد معادلة الكرة التي مركزها   (3,,−5) MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4HqaqFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaiikaiabgkHiTiaaisdacaGGSaGaaGymaiaaicdacaGGSaGaaGinaiaacMcacaGGSaGaaiikaiaaigdacaGGSaGaaGimaiaacYcacaaI5aGaaiykaaaa@41DD@  وطول نصف قطرها  8  
64  = (x  −  3) 2 + (y  +  2) 2 + (z  +  5) 2   MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4HqaqFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaiikaiaadIhacqGHRaWkcaaI0aGaaiykamaaCaaaleqabaGaaGOmaaaakiabgUcaRiaacIcacaWG5bGaey4kaSIaaGOmaiaacMcadaahaaWcbeqaaiaaikdaaaGccqGHRaWkcaGGOaGaamOEaiabgkHiTiaaiodacaGGPaWaaWbaaSqabeaacaaIYaaaaaaa@4625@
8  = (x+5) 2 + (y+2) 2 + (z3) 2 MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4HqaqFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaiikaiaadIhacqGHRaWkcaaI0aGaaiykamaaCaaaleqabaGaaGOmaaaakiabgUcaRiaacIcacaWG5bGaey4kaSIaaGOmaiaacMcadaahaaWcbeqaaiaaikdaaaGccqGHRaWkcaGGOaGaamOEaiabgkHiTiaaiodacaGGPaWaaWbaaSqabeaacaaIYaaaaaaa@4625@
64  = (x-4) 2 + (y-2) 2 + (z+3) 2 MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4HqaqFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaiikaiaadIhacqGHRaWkcaaI0aGaaiykamaaCaaaleqabaGaaGOmaaaakiabgUcaRiaacIcacaWG5bGaey4kaSIaaGOmaiaacMcadaahaaWcbeqaaiaaikdaaaGccqGHRaWkcaGGOaGaamOEaiabgkHiTiaaiodacaGGPaWaaWbaaSqabeaacaaIYaaaaaaa@4625@
64  = (x+3) 2 + (y+4) 2 + (z5) 2 MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4HqaqFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaiikaiaadIhacqGHRaWkcaaI0aGaaiykamaaCaaaleqabaGaaGOmaaaakiabgUcaRiaacIcacaWG5bGaey4kaSIaaGOmaiaacMcadaahaaWcbeqaaiaaikdaaaGccqGHRaWkcaGGOaGaamOEaiabgkHiTiaaiodacaGGPaWaaWbaaSqabeaacaaIYaaaaaaa@4625@
            
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