Sagot :
Bonjour,
Factoriser :
= 25-30x+9x²
= 5²-30x+9x²
= 5²-2×5×3x+9x²
= 5²-2×5×3x²+3²x²
= 5²-2×5×3x+(3x)²
= (5-3x)²
Bonne journée.
Bonjour,
Factoriser :
= 25-30x+9x²
= 5²-30x+9x²
= 5²-2×5×3x+9x²
= 5²-2×5×3x²+3²x²
= 5²-2×5×3x+(3x)²
= (5-3x)²
Bonne journée.