a² +b²=9 and ab=4 find the value of 3(a+b)²-2(a-b) ².
Answers
Answered by
9
mark as brainliests.....
Attachments:
Answered by
5
Step-by-step explanation:
a ²+ b² =9
ab= 4
(a+b)²=a²+b²+2.a.b
=> 9+2×4
=>17
(a-b)² = a²+b²-2.a.b
=> 9-2×4
=> 1
3(a+b)² - 2(a-b)²
=>3×17 - 2×1
=>51 - 2
=> 49
Hope this is helpful to U ✨
Similar questions