Math, asked by anindyabiswas1970, 3 months ago

factorise 7+10(2a-3b)-8(2a-3b)^2​

Answers

Answered by bpwet
0

Answer:

− ( 4 a − 6 b + 1 )(8 a − 12 b − 7 )

Step-by-step explanation:

Factor  −  1 out of  7 + 10 ( 2 a - 3 b ) − 8 ( 2 a − 3 b ) 2

= −  ( 8 ( 2 a − 3b ) 2 - 10 ( 2 a − 3b)− 7 )

Let  u  =  2 a − 3 b

Substitute u  for all occurrences of  2 a − 3 b − ( 8 u 2 − 10 u − 7 )

− ( ( 2u+1) ( 4 u − 7 ) )  

Replace all occurrences of  u  with  2 a − 3 b − (( 2 ( 2 a - 3 b ) + 1 ) ( 4 ( 2 a − 3 b ) − 7 ) )

− ( 4 a − 6 b + 1 )(8 a − 12 b − 7 )

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