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[@Sm_parmanu_vlogs_11]

30:01
ANSWER A 15
Formula 👉(a+b)² -(a-b)² =4ab (eq no.1)
now
👉(a+5b)² -(a-5b)² =4a(5b)
👉(a+5b)² -(a-5b)² =20ab
👉(a-5b)² = (a+5b)² - 20ab
Now
(a+5b)= 25 , ab=20
Put the value
👉(a-5b)² = (25)² - 20(20)
👉(a-5b)² = 625 - 400
👉(a-5b)² = 225
👉(a-5b)=√225
👉(a-5b)= 15😊

[@PMMalviya-z1s]

30:01
ANSWER A 15
Formula 👉(a+b)² -(a-b)² =4ab (eq no.1)
now
👉(a+5b)² -(a-5b)² =4a(5b)
👉(a+5b)² -(a-5b)² =20ab
👉(a-5b)² = (a+5b)² - 20ab
Now
(a+5b)= 25 , ab=20
Put the value
👉(a-5b)² = (25)² - 20(20)
👉(a-5b)² = 625 - 400
👉(a-5b)² = 225
👉(a-5b)=√225
👉(a-5b)= 15

[@smsupreme11]

30:01 galt mat bata bhai Q no. 35 yese hoga
👉(a+b)Sq -(a-b)Sq =4ab
Then
👉(a+5b)Sq-(a-5b)Sq=4(a)(5b)
👉(a+5b)Sq-(a-5b)Sq=20ab
Now (a+5b)=25 , ab =20
Then put the value
👉25Sq -(a-5b)sq = 20(20)
👉625 -(a-5b)Sq =400
👉625 -400 =(a-5b)Sq
👉(a-5b)Sq =225
👉(a-5b)Sq=√225
👉(a-5b) = 15
OK LOGO KO GALAT MAT BATAO NHI ATA HE TOH

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[@smsupreme11]

​@@ExamRays 30:01 galt mat bata bhai Q no. 35 yese hoga
👉(a+b)Sq -(a-b)Sq =4ab
Then
👉(a+5b)Sq-(a-5b)Sq=4(a)(5b)
👉(a+5b)Sq-(a-5b)Sq=20ab
Now (a+5b)=25 , ab =20
Then put the value
👉25Sq -(a-5b)sq = 20(20)
👉625 -(a-5b)Sq =400
👉625 -400 =(a-5b)Sq
👉(a-5b)Sq =225
👉(a-5b)Sq=√225
👉(a-5b) = 15
OK LOGO KO GALAT MAT BATAO NHI ATA HE TOH

[@Sm_parmanu_vlogs_11]

​@@ExamRays30:01
ANSWER A 15
Formula 👉(a+b)² -(a-b)² =4ab (eq no.1)
now
👉(a+5b)² -(a-5b)² =4a(5b)
👉(a+5b)² -(a-5b)² =20ab
👉(a-5b)² = (a+5b)² - 20ab
Now
(a+5b)= 25 , ab=20
Put the value
👉(a-5b)² = (25)² - 20(20)
👉(a-5b)² = 625 - 400
👉(a-5b)² = 225
👉(a-5b)=√225
👉(a-5b)= 15

[@PMMalviya-z1s]

​@@ExamRays30:01
ANSWER A 15
Formula 👉(a+b)² -(a-b)² =4ab (eq no.1)
now
👉(a+5b)² -(a-5b)² =4a(5b)
👉(a+5b)² -(a-5b)² =20ab
👉(a-5b)² = (a+5b)² - 20ab
Now
(a+5b)= 25 , ab=20
Put the value
👉(a-5b)² = (25)² - 20(20)
👉(a-5b)² = 625 - 400
👉(a-5b)² = 225
👉(a-5b)=√225
👉(a-5b)= 15

[@SMstory11]

30:01
ANSWER A 15
Formula 👉(a+b)² -(a-b)² =4ab (eq no.1)
now
👉(a+5b)² -(a-5b)² =4a(5b)
👉(a+5b)² -(a-5b)² =20ab
👉(a-5b)² = (a+5b)² - 20ab
Now
(a+5b)= 25 , ab=20
Put the value
👉(a-5b)² = (25)² - 20(20)
👉(a-5b)² = 625 - 400
👉(a-5b)² = 225
👉(a-5b)=√225
👉(a-5b)= 15