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bonjour
A = ( x + 4 ) ( 2 x - 1 ) - ( 3 x - 5 )
= 2 x² - x + 8 x - 4 - 3 x + 5
= 2 x² + 4 x + 1
b = ( 3 x + 2 )² + ( 4 x - 5 )²
= 9 x² + 12 x + 4 + 16 x² - 40 x + 25
= 25 x² - 28 x + 29
bonjour
A = ( x + 4 ) ( 2 x - 1 ) - ( 3 x - 5 )
= 2 x² - x + 8 x - 4 - 3 x + 5
= 2 x² + 4 x + 1
b = ( 3 x + 2 )² + ( 4 x - 5 )²
= 9 x² + 12 x + 4 + 16 x² - 40 x + 25
= 25 x² - 28 x + 29