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CBSE Class 7 Answered

Simplify:

20x - [15x3 + 5x2 - {8x2 - (4 - 2x - x3) - 5x3} - 2x]
 
Asked by arunagrawal83.ag | 30 Jan, 2016, 08:00: PM
answered-by-expert Expert Answer
begin mathsize 14px style 20 x minus open square brackets 15 x cubed plus 5 x squared minus open parentheses 8 x squared minus open parentheses 4 minus 2 x minus x cubed close parentheses minus 5 x cubed close parentheses minus 2 x close square brackets equals 20 x minus open square brackets 15 x cubed plus 5 x squared minus open parentheses 8 x squared minus 4 plus 2 x plus x cubed minus 5 x cubed close parentheses minus 2 x close square brackets equals 20 x minus open square brackets 15 x cubed plus 5 x squared minus 8 x squared plus 4 minus 2 x minus x cubed plus 5 x cubed minus 2 x close square brackets equals 20 x minus 15 x cubed minus 5 x squared plus 8 x squared minus 4 plus 2 x plus x cubed minus 5 x cubed plus 2 x equals negative 15 x cubed plus x cubed minus 5 x cubed minus 5 x squared plus 8 x squared plus 20 x plus 2 x plus 2 x minus 4 equals negative 19 x cubed plus 3 x squared plus 24 x minus 4 end style
Answered by Rashmi Khot | 01 Feb, 2016, 10:30: AM

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