(a+b+c)2=a2+b2+c2+2ab+2ac+2bc প্রমাণ কর (a-b)^2 এর সূত্রের মাধ্যমে।
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sorry I dont understand bengali
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সুত্র টি হবে
(a+b+c)² = a² + b² + c² + 2ab + 2bc + 2ca
= (2 + 3 + 6)²
= 2² + 3² + 6² + 2×2×3 + 2×3×6 + 2×6×2
= 4 + 9 + 36 + 12 + 36 + 24
= 121
এবার
( a - b )² = (a - b) (a + b)
= ( 90 - 92)²
= (90 - 2) ( 90 + 2)
= (90)² - 2²
= 8100 - 4
= 8096
(a+b+c)² = a² + b² + c² + 2ab + 2bc + 2ca
= (2 + 3 + 6)²
= 2² + 3² + 6² + 2×2×3 + 2×3×6 + 2×6×2
= 4 + 9 + 36 + 12 + 36 + 24
= 121
এবার
( a - b )² = (a - b) (a + b)
= ( 90 - 92)²
= (90 - 2) ( 90 + 2)
= (90)² - 2²
= 8100 - 4
= 8096
Anonymous:
hey
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