a + b = √3 এবং a - b = √2 হলে, 8ab (a² + b²) = ?
Solution
Correct Answer: Option D
দেওয়া আছে,
8ab(a2+b2)
=4ab.2(a2+b2)
={(a+b)2- (a-b)2} {(a+b)2+(a-b)2}
={(√3)2 -(√2)2}
=(3-2)(3+2)
=5.1
=5
8ab(a2+b2)
=4ab.2(a2+b2)
={(a+b)2- (a-b)2} {(a+b)2+(a-b)2}
={(√3)2 -(√2)2}
=(3-2)(3+2)
=5.1
=5
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