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If (a-4)2 + (b-7)2 + (c - 11)2 = 0 find the value of a² + b² + c² - abc. |
-122 122 308 -186 |
-122 |
If (a-m)2 + (b-n)2 + (c - o)2 = 0 then a - m = 0 b - n = 0 c - o = 0 So, a = 4 b = 7 c = 11 Now, a² + b² + c² - abc = 4² + 7² + 11² - 4x7x11 = 16 + 49 + 121 - 308 = -122 |
