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A=a(4 a-5) = 4a² -5a
B=(2 x-4)(x+7) = 2x² +14x -4x -28 = 2x² +10x -28
C=25b-15 = 5(5b -3)
D= (4 x-1) (2 x+3) + (x-7) (4 x-1)
(4x-1)((2x+3 + x-7)
(4x-1)( 3x -4)
A=a(4 a-5) = 4a² -5a
B=(2 x-4)(x+7) = 2x² +14x -4x -28 = 2x² +10x -28
C=25b-15 = 5(5b -3)
D= (4 x-1) (2 x+3) + (x-7) (4 x-1)
(4x-1)((2x+3 + x-7)
(4x-1)( 3x -4)