f(x) = -8x

et

g(x) = -6x + 14

a)

B2=-8*B1

b) B2 = -8 * (-3) = 24

C2 = -8 * 0 = 0

donc tu sais pour D2

c) E3 = -4

donc -6 * E1 + 14 = -4

-6*E1 = -18

E1 = 18/6 = 3

d) h(x) = f(x) + g(x) - 14

          = -8x + (-6x) + 14 - 14 = -14x