if a²+b²+c²-ab -bc- ca=0 prove that a=b=c.
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Step-by-step explanation:
We have,
a² + b² + c² - ab - bc - ca = 0
=> 2a² + 2b² + 2c² - 2ab - 2bc - 2ca = 2 × 0
=> (a² - 2ab + b2) + (b² - 2bc + c²) + (c² - 2ac +
a²) = 0
=> (a-b)² + (b-c)² + (c-a)² = 0
=> a - b = 0, b - c = 0, c - a = 0
=> a = b, b = c and c = a => a = b = c
• Therefore, a = b = c
- I hope it's help you.☺
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