Pour les exercices 51 a 53 factoriser chaque expression merci d avance

bonjour

A =  a²+ 3 a

A = a ( a + 3)

B = 4 b² - 12

B = 4 ( b² - 3 )

A = 2 t² - 3 t

A = t ( 2 t - 3 )

B = 4 x² + 20 x

B = 4 x ( x + 5 )

A = - 5 x² + 25 x

A =  5 x ( - x + 5 )

B = - 10 - 16 a

B =   2 ( - 5 - 8 a)