Math, asked by kh0738583, 2 months ago

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কয়ে দেখি
দুটি ধনাত্মক অখণ্ড সংখ্যার অন্তর 3 এবং তাদের বর্গের সমষ্টি 117; সংখ্যা দুটি হিসাব করে লিখি।​

Answers

Answered by Anonymous
1

Step-by-step explanation:

ধরি , একটি ধনাত্মক অখণ্ড সংখ্যা x

যেহেতু দুটি ধনাত্মক অখণ্ড সংখ্যার অন্তর 3 তাই অপর সংখ্যাটি হবে x+3

তাদের বর্গের সমষ্টি 117

অর্থাৎ ,

=> x^2 + (x+3) ^2 = 117

=> x^2 + x^2 + 6x + 9 = 117

=> 2x^2 + 6x + 9 = 117

=> 2x^2 + 6x + 9 - 117 = 0

=> 2x^2 + 6x - 108 = 0

=> x^2 + 3x - 54 = 0

=> x^2 + (9-6) x - 54 = 0

=> x^2 + 9x - 6x - 54 = 0

=> x(x+9) - 6(x+9) = 0

=> (x+9)(x-6) = 0

=> (x+9) = 0 => (x-6) = 0

=> x = -9 => x = 6

যেহেতু সংখ্যা দুটি ধনাত্মক তাই -9 গ্রহণযোগ্য নয়।

অর্থাৎ সংখ্যা দুটি হবে 6 এবং (6+3) = 9

Answered by amitnrw
0

Given : The difference between two positive integers is 3 and the sum of their squares is 117;  

To Find :  the numbers

Solution:

Let say two numbers are  a  , a + 3

sum of their squares is 117;  

=> a² + ( a + 3)²  = 117

=> a²  + a²  + 6a  + 9 = 117

=> 2a²  + 6a - 108 = 0

=> a² + 3a - 54 = 0

=> a² + 9a - 6a - 54 = 0

=> a( a + 9) - 6( a + 9) = 0

=> (a - 6)(a + 9) = 0

=> a = 6 , a = - 9

a is positive

Hence a  = 6

a + 3 = 9

Two numbers are 6 and 9

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