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Intermediate Algebra Topic 2a: Symbols
Substituting values 2
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	Algebra is a language which uses numbers and letters and which has rules. 2b means 2 x b, so if b = 3 then 2b = 6 m² means m x m, so if m = 4 then m² = 16 cd means c x d, so if c = 2 and d = 7 then cd = 14. Still need more explanation?