Question

a-b=7and ab=9 then a square+b square=?

Answer 1

hey mate !!!


here is your answer !!




( a - b ) ² = a² + b² -2 * a * b


=> (7)² = a² + b² - 2 * 9


49 + 18 = a² + b²


a² + b² = 67


hence , your answer is 67


hope it helps you dear !!!

thanks !!

Answer 2

HELLO DEAR,


given that:-

ab = 9

a - b = 7

[On SQUARING both side]


we get,


(a - b)² = 7²

⇒a² + b² - 2ab = 49
∴ [ (a - b)² = a² + b² - 2ab , & 7² = 49]

⇒(a² + b²) = 49 + 2×9

⇒(a² + b²) = 49 + 18

⇒(a² + b²) = 67



I HOPE ITS HELP YOU DEAR,
THANKS