Sagot :
Bonjour,
A =(1/2x + 3)²- 2x (4x -2/3).
= (x/2 +3) (x/2+3) - 8x² + 4x/3
=x²/4 + 3x/2 + 3x/2 + 9 - 8x² + 4x/3
x²/4 -8x² = x²/4 - 32x²/ 4 = -31x²/4
3x/2 + 3x/2 + 4x/3= 9x/6 + 9x/6 + 8x/6 = 28x/6 = 14x/3
-31x²/4 + 14x/3 +9
Bonjour,
A =(1/2x + 3)²- 2x (4x -2/3).
= (x/2 +3) (x/2+3) - 8x² + 4x/3
=x²/4 + 3x/2 + 3x/2 + 9 - 8x² + 4x/3
x²/4 -8x² = x²/4 - 32x²/ 4 = -31x²/4
3x/2 + 3x/2 + 4x/3= 9x/6 + 9x/6 + 8x/6 = 28x/6 = 14x/3
-31x²/4 + 14x/3 +9