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Qno.7 Given: a3-b3=625 a+b=5 a2-b2 = 25 Sol. a2-b2 = 25 (a+b)(a-b)=25 5×(a-b)=25 (a-b)=5 Put this value in a3-b3=(a-b)(a2+ab+b2) => 625=5(a2+ab+b2) =>(a2+ab+b2)=125 Ans.
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Qno.7
Given: a3-b3=625
a+b=5
a2-b2 = 25
Sol.
a2-b2 = 25
(a+b)(a-b)=25
5×(a-b)=25
(a-b)=5
Put this value in a3-b3=(a-b)(a2+ab+b2)
=> 625=5(a2+ab+b2)
=>(a2+ab+b2)=125 Ans.
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Q7 (a+b)(a-b)=25
(a-b)=5
(a^3-b^3)=(a-b) (a^2+ab+b^2)
625=5(a^2+ab+b^2)=125
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Sir group me hme bhi add kr lijiye hm aapse 6year se pdh rha huu ...sir aapki vjh se mera RRC GROUP D me selection ho gya hii ...ab ALP and JE Aapke course lekr pdhai kr rha huu ..,....🎉🎉🎉🎉🎉🎉
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Question 7, Answer 125 hoga
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Sar hamen bhi add kar lijiye
Q.7 का उत्तर 125 आ तो रहा है
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Q7
(a^3-b^3)=(a-b) (a^2+ab+b^2)
625/5= (a^2+ab+b^2)
125=(a^2+ab+b^2)
Bhi ho sakta kya sir
a^2-b^2 =25
a+b=5
a-b =5
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Que. 24
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Sir 7th Ans 125 hai
Check it
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