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If a+b=13 and a-b=3 , then find the value of $a^{2} + b^{2}$

Created: 5 years ago | Updated: 3 years ago

Updated: 3 years ago

69

79

89

91

96

Sonali Bank Ltd Sonali Bank Ltd - Officer (IT) - 23.12.2016 Aptitude and Quantitative Skills

ব্যাখ্যা

2k

Best Ans:

(a² + b²) = 1/2 {(a + b)² + (a - b)²}

= 1/2 {(13)² + (3)²}

= 1/2 (169 + 9)

= 1/2 * 178

= 89

5 years ago

1 0

Md Azizur Rahman

Founder of Satt

Aptitude and Quantitative Skills

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