Please solve this question.
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Answer:
40
Step-by-step explanation:
=> a square + b square + c square - ab - bc - ca = -25
=> a square + b square + c square + 25 = ab + bc + ca
=> a square + b square + c square + 25 = 10 [Since, ab + bc + ca = 10]
=> a square + b square + c square + 25 - 10 = 0
=> a square + b square + c square + 15 = 0
=> (a + b + c) whole square + 15 = 0
=> (5) whole square + 15 = 0 [Since, a + b + c = 5]
=> 25 + 15 = 0
=> 40 (ANSWER)
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