bonjour
A = x² - 6 x + 9 - ( x - 2 x² - 3 + 6 x )
= x² - 6 x + 9 - x + 2 x² + 3 - 6 x
= 3 x² - 13 x + 12
C = 5/3 - 20/21
= 35/21 - 20/21
= 15 /21
= 5 / 7
Bonjour,
A=(x-3)²-(x-3)(1-2x)
=x²-6x+9-(x-2x²-3+6x)
=x²-6x+9+2x²-7x+3
A=3x²-13x+12
C=5/3 - 4/7 * 5/3
=5/3 - (4*5)/(7*3)
=5/3 - 20/21
=35/21 - 20/21
= (35-20)/21
=15/21
C= 5/7
