Archive
9th of September 2015
Mathematics
Q:

Swati Singh - CBSE - Class IX

Wednesday, September 09, 2015 at 18:26:PM

A:

,begin mathsize 14px style I n space r i g h t space t r i a n g l e space A B C comma space A C space i s space t h e space h y p o t e n u s e. B y space P y t h a g o r a s space t h e o r e m comma space w e space h a v e  left parenthesis x right parenthesis squared plus left parenthesis x minus 2 right parenthesis squared equals left parenthesis x plus 2 right parenthesis squared x squared plus x squared minus 4 x plus 4 equals x squared plus 4 x plus 4 2 x squared minus 4 x plus 4 equals x squared plus 4 x plus 4 2 x squared minus x squared minus 4 x minus 4 x equals 0 x squared minus 8 x equals 0 x left parenthesis x minus 8 right parenthesis equals 0 T h e n space x equals 0 space o r space x equals 8 B u t space 0 space c a n n o t space b e space t h e space l e n g t h space o f space s i d e. T h u s space x equals 8 end style

Wednesday, September 09, 2015 at 18:33:PM