Bonsoir

2j(3j-5)

=2j*3j+2j*-5

=6j²-10j

-4h(h-2)

=-4h*h-4h*-2

=-4h²+8h

(4k-6)(k+1)

=4k*k+4k*+1-6*k-6*+1

=4k²+4k-6k-6

=4k²-2k-6

7g(2g-3)

=14g²-21g

-3w(4-w)

=-12w+3w²

y(8y-4)

=8y²-4y

(2h-3)(3h+2)

=6h²+4h-9h-6

=6h²-5h-6

(11h-7)(h-4)

=11h²-44h-7h+28

=11h²-51h+28

(5j-7)²

=(5j)²+2*5j*-7+(-7)²

=25j²-70j+49

(5s-5)(5s+5)

=25s²+25s-25s-25

=25s²-25

(4t-6)(6t+9)

=24t²+36t-36t-54

=24t²-54

(3g-7)(3g+7)

=9g²+21g-21g-49

=9g²-49

La réponse est erdaigle

*=multiplier