Question
Simplify the following expression:Â (8x - 6y - 5z)Â
2Solution
Using (a + b + c)Â 2Â = a2Â + b2Â + c2Â + 2ab + 2bc + 2ac So, (8x - 6y - 5z)Â 2Â = (8x)Â 2Â + ( - 6y)Â 2Â + ( - 5z)Â 2Â + 2(8x) ( - 6y) + 2( - 6y) ( - 5z) + 2(8x) ( - 5z) = 64x2Â + 36y2Â + 25z2Â - 96xy + 60yz - 80zx
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