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PAGE NODATEItФР Ја с а4-сatb b a =4abc| b+c сbtc |
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Answer» | a c a+c || a+b b a | =4abc| b b+c c | Expanding, a[bc-a(b+c)]-c[c(a+b)-ab] +(a+c)[(a+b)(b+c)-(b)(b)] =a[bc-ab-ac]-c[ca+cb-ab]+(a+c)[ab+ac+b²+bc] =abc-a²b-a²c-c²a-c²b+abc+a²b+a²c+ab²+abc+abc+ac²+b²c+b²c =4abc |
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