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Is x2 a Polynomial

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Hi experts Simplify the expression {-a[a+{a+b-2a(a-2b)}-b]

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Hi experts Simplify the equation [-m-[m+n-2m-(m+2n)]-n]]

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Plz simplify this question fast 4r2 (3r-5)-2r2(6r-10) ( the 2 after 4r and 2r are squared )

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Q Find the value of k if the expression 2a^2 - 3a + 7k = 12 at a = -2

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Pls solve 4 and 5 Q4 (a) What should be added to x2 + xy + y2 to obtain 2x2 + 3xy acirc; euro; lsaquo; (b) What shoul

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Q What should be added to x2+xy Acirc; nbsp;+y2 Acirc; nbsp;to Acirc; nbsp;obtain Acirc; nbsp;2x2+3xy Acirc; nbsp;

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How to subtract an algebric expression

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Add 3mn,-5mn,8mn,-4mn

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Simplify: 5x7y5 Atilde; #8212;10a3x2-32x5y3 Atilde; #8212;6a2y-2