1.

.22. If a + b + c = 9 and a+ b + c = 25. Find ab + bc + ca.​

Answer»

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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