Sagot :
Bonjour.
1_factoriser A
A=(2x - 3)(5x + 7) + 25x²+70x+49
A=(2x - 3)(5x + 7) +(5x+7)²
A=(2x - 3)(5x + 7) + (5x + 7) × (5x + 7)
A=(5x + 7)(2x - 3+5x +7)
A=(5x + 7)(7x + 4)
Bonjour.
1_factoriser A
A=(2x - 3)(5x + 7) + 25x²+70x+49
A=(2x - 3)(5x + 7) +(5x+7)²
A=(2x - 3)(5x + 7) + (5x + 7) × (5x + 7)
A=(5x + 7)(2x - 3+5x +7)
A=(5x + 7)(7x + 4)