Effectue et reduis si possible. 5x-(4-3x)= 8m*8m²= (-t+5)*(-2)= (a-4)*(2a+3)=

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

8m × 8m²
= 64m³

(- t + 5) × (- 2)
= 2t - 10

(a - 4) × (2a + 3)
= 2a² + 3a - 8a - 12
= 2a² - 5a - 12

5x - (4-3x)
5x -4 +3x
8x -4

8m X 8m² =64 m au cube

(-t+5)(-2)
+2t -10

(a-4)(2a+3)
2a² -8a +3a -12
2a² -5a -12