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Exercice 12: Pour chacune des expressions suivantes, développer, si possible, puis réduire.
A(x) = 5(2x + 3)
B(r) = (5 + 2r) x 3
C(x) = 4(5x x 2)
D(V) = 5+ (2y + 3)
E(x) = 4(5x - 2)
F(t) = 4(
3-2)
G(n) = 4n + (3n+ 1)
H(x) = 17 - 2(-5 - x) 1(k) = 13k - (2k + 4) x 10
J(m) = 3(2m - 9) - (4m + 5)-3 K(t) = (-2t + 1) -t
L(x) = 8(5x + 2) + 3

Sagot :

A(x) = 10x+15
B(r) = 15+6r
C(x) = 20x +8
D(v) = 20y+15
E(x) = 20x-8
F(t)= 12-8=4
G(n) = 12n^2 +4n


L(x) = 45x +19
TEANOHRA12

Réponse:

A(x)= 5(2x+3)

= 10x + 15

B(x)= (5+2r) × 3

= 15 + 6r

C(x)= 4(5x × 2)

= 4(10x)

= 40x

D(y)= 5+ (2y+3)

= 8+2y

E(x)= 4(5x-2)

= 20x - 8

F(t)= 4(3-2)

= 12-8

= 4

G(n)= 4n + (3n+1)

= 7n+1

H(x)= 17 -2(-5-x)

= 17+10+2x

=27 + 2x

I(k)= 13k - (2k+4) × 10

= 13k -2k +4 ×10

= 13k -2k + 40

=11k + 40

J(m)= 3(2m -9 ) - (4m +5) -3

= 6m - 27 -4m -5 -3

= 2m - 35

K(t)= (-2t+1-t)

= -2t -t +1

= -3t +1

L(x)= 8(5x+2) +3

= 40x + 16 + 3

= 40x + 19