If (a+a+a)=(b+b+b+b)and (a+b)=7, then what is the value of (a2-b2)?
Created: 6 years ago |
Updated: 3 years ago
best des
ব্যাখাঃ a + a + a = b + b + b + b
3a = 4b
and, a + b = 7
3a + 3b = 7× 3 [ উভয়ের সাথে ৩ গুন করে]
4b + 3b = 21 [ 3a = 4b ]
7b = 21
b = 3
এখন, a + b = 7
a = 7 y b
a = 7 - 3
a = 4
a2 - b2 = 42 - 32 = 16 - 9 = 7
Md Azizur Rahman
Founder of Satt
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