If (a + b) =10 and ab = 21, then a^ + b^ = ?
Answers
Answered by
1
Step-by-step explanation:
a+b=10
ab=21
a
3
+b
3
=(a+b)(a
2
+b
2
−ab)
a
3
+b
3
=(10)[(a+b)
2
−2ab−ab]
a
3
+b
3
=(10)[(10)
2
−3(21)]
(a
3
+b
3
)=370.
Answered by
0
Answer:
Given:- ( a + b)= 10
ab=21
a=3
b=7
= a^2 + b^2
= 7^2 + 3^2
= 49 + 9
= 58
Similar questions