Factorise: A=75-12² B=98x² -28x+2 C=(x-4)² -(3-2x)² D=3-48x² Merci!

Bonsoir,

Factorise :

A=75-12² ???

B=98x² -28x+2

B = 2 (7x - 1)²

C=(x-4)² -(3-2x)²

C = (x - 4) (x + 4) - (3 - 2x) (3 - 2x)

C = (x + 4 - 2x - 3)  (x - 4 - 3 + 2x)

C = (- x + 1) (3x - 7)

D=3-48x²

D = 3 (4x - 1) (4x + 1)