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22. If a + b + c = 9 and a
+ b + c = 25. Find ab + bc + ca.
Answers
Answered by
0
Answer:
34
Step-by-step explanation:
a + b + c = 9
a + b + c = 25
By adding above two equations
2a + 2b + 2c = 34
So, ab + bc + ca = 34
(as in both equations a variable is two time)
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