Répondre :
J = 7x²+3x+2x²-5x
J = 9x²-2x
K = 3(2a-4b)-5(-2a-b)
K = 6a-12b+10a+5b
K = 16a-7b
L = (2x+3)(5x-1)
L = 10x²-2x+15x-3
L = 10x²+13x-3
J = 9x²-2x
K = 3(2a-4b)-5(-2a-b)
K = 6a-12b+10a+5b
K = 16a-7b
L = (2x+3)(5x-1)
L = 10x²-2x+15x-3
L = 10x²+13x-3
J=7x²+3x+2x²-5x
=9x²-2x
=x(9x-2)
K = 3(2a-4b)-5(-2a-b)
=6a-12b+10a+5b
=16a-7b
L=(2x+3)(5x-1)
=10x²-2x+15x-3
=10x²+13x-3
=9x²-2x
=x(9x-2)
K = 3(2a-4b)-5(-2a-b)
=6a-12b+10a+5b
=16a-7b
L=(2x+3)(5x-1)
=10x²-2x+15x-3
=10x²+13x-3