You have 3 terms, two of which contain the common factor (2a-b)
Is that -8 at the end supposed to be a multiplier ?
The way you typed it, it does not factor.
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Key: logx= log base x1. Prove that: (logx64 +logx4 -logx8)/(logx1024) =1/2 2.factorize by grouping r^2s^2+3t^2+r^2t^2+3s^2