Bonsoir,
A= 6x² +10x -27x -15
= 6x² -17x -15
B= 28x² -21x + 32x -24
= 28x² + 11x -24
C = 2x² -3x -2x +3
= 2x²-5x +3
D= 6x² -8x -15x +20
= 6x² - 23x +20
