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CBSE Class 9 Answered

Solve: 5(3x+y) square + 6(3x+y) -8
Asked by nisha_vini29 | 21 Mar, 2017, 05:50: PM
answered-by-expert Expert Answer

begin mathsize 16px style 5 left parenthesis 3 straight x plus straight y right parenthesis squared space plus space 6 left parenthesis 3 straight x plus straight y right parenthesis space minus 8
Put space 3 straight x plus straight y equals straight m
5 straight m squared plus 6 straight m minus 8
5 straight m squared plus 10 straight m minus 4 straight m minus 8
5 straight m open parentheses straight m plus 2 close parentheses minus 2 open parentheses straight m plus 2 close parentheses
open parentheses straight m plus 2 close parentheses open parentheses 5 straight m minus 2 close parentheses
As comma
3 straight x plus straight y equals straight m
straight m plus 2 equals 3 straight x plus straight y plus 2 space and space 5 straight m minus 2 equals 5 left parenthesis 3 straight x plus straight y right parenthesis minus 2 equals 15 straight x plus 5 straight y minus 2
end style

Answered by | 21 Mar, 2017, 05:56: PM
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