if a+b=5and ab=2 the find a square+b square
Answers
Answered by
3
Answer:
Step-by-step explanation:
a²+b²=(a+b)²
a²+b²+2ab
(5)²+2(2)=25+4=29
Answered by
3
Answer :–
- 21 is the value of a² + b².
Given :–
- a + b = 5.
- ab = 2.
To Find :–
- The value of a² + b².
Solution :–
We know that,
• a² + b² + 2ab = (a + b)²
Now, we transpose +2ab from L.H.S. to R.H.S.,
• a² + b² = (a + b)² – 2ab –––––(1)
Here,
The given values of (a + b) and (ab) are,
- a + b = 5
- ab = 2
Now, substitute both the values in equation (1),
Now, open both the brackets.
Hence,
The value of a² + b² where, a + b = 5 and ab = 3 is 21.
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