If (a+a+a)=(b+b+b+b)and (a+b)=7, then what is the value of (a2-b2)?
If (a+a+a)=(b+b+b+b)and (a+b)=7, then what is the value of (a2-b2)? Correct Answer 7
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
মোঃ আরিফুল ইসলাম
Feb 20, 2025