if a+b =12 and ab=9 then a² + b² = ???
Answers
Answered by
0
Answer:
we get a2+b2-2ab=49
Now since ab=9
=> a2+b2-2*9=49
=> a2+b2=49+18=67 ans
Step-by-step explanation:
Answered by
2
Given:
a + b = 12
ab = 9
Solution:
(a + b)² = a² + 2ab + b²
12² = a² + 2 × 9 + b²
144 = a² + 18 + b²
144 - 18 = a² + b²
a² + b² = 126 ,, is Answer
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