Bonjour Pouvez-vous m'aider svp pour un devoir math 4ème que je ne comprends pas merci beaucoup

bjr

ex 3

5x - (3 - 4x) = 5x - 3 + 4x = 9x - 3

5 (6 - y) - ras

11 + 2 (x-6) = 11 + 2x - 12 = 2x - 1             puisque k(a+b) = ka + kb

8x - (5x+2) + (3-4x) = 8x - 5x - 2 + 3 - 4x = -x + 1

x (2x+4) - ras

4x (3-2x) - x² = 12x - 8x² - x² = -9x² + 12x

ex 4

3x + 3*7 = 3 (x+7)

2x - 4 = 2 (x-2)

36x² + 12x = 12x (3x+1)

Salut !

6³ × 6⁵ = 6³⁺⁵ = 6⁸

3⁴/3⁶ = 3⁴⁻⁶ = 3⁻²

(2⁴)² = 2⁴ˣ² = 2⁸

3(1-3)⁵-2²(3+2)=3(-2)⁵-4(5)=3(-32)-20=-96-20=-116

(5-2×3)⁴ / (2-3)⁵ = (-1)⁴ / (-1)⁵ = 1 / (-1) = -1

5x-(3-4x)=5x-3+4x=9x-3

5(6-y)=30-5y

11+2(x-6)=11+2x-12=2x-1

8x-(5x+2)+(3-4x)=8x-5x-2+3-4x=1-x

x(2x+4)=2x²+4x

4x(3-2x)-x²=12x-8x²-x²=-9x²+12x

3(x)+3(7)=3(x+7)

2x-4=2(x-2)

36x²+12x=12x(3x+1)