a + b = $ 3 $ এবং a - b = $ 2 $ হলে 8ab (a2+ b2) = ?

ঘ) 5 — 8ab (a 2 + b 2 ) = 4ab.2(a 2 + b 2 ) = (a+b) 2 - (a-b) 2 (a+b) 2 + (a-b) 2 = ($ 3 $ 2 - ($ 2 $ 2 ($ 3 $ 2 + ($ 2 $ 2 = (3-2) (3+2) = 5.1 = 5

a + b = $ 3 $ এবং a - b = $ 2 $ হলে 8… | Answer

Subject

গাণিতিক যুক্তি

Topic

বীজগাণিতিক সূত্রাবলী এবং প্রয়োগ

ক)

খ)

গ)

ঘ)

8ab (a 2 + b 2 ) = 4ab.2(a 2 + b 2 ) = { (a+b) 2 - (a-b) 2 } { (a+b) 2 + (a-b) 2 } = { (

\sqrt 3

2 - (

\sqrt 2

2 } { (

\sqrt 3

2 + (

\sqrt 2

2 } = (3-2) (3+2) = 5.1 = 5

a2 + \frac{1}{{a2}} = 18

a - \frac{1}{a}

a2 + \frac{1}{{a2}} = 83

a - \frac{1}{a}