A=(2x + 5) (3x + 7 )
=2x × 3x + 2x × 7 + 5× 3x + 5 ×7
=6x² + 14x +15 x+ 35
=6x² +29x +35
B= (2x - 5) (3x-2)
=2x × 3x -2x × 2 -5 ×3x -5 ×(-2)
=6x² -4x -15x + 10
=6x - 19x +10
F= (2+x) (5x-4)
=2×5x-2×4+x 5x+ 4x
=10x -8 +5x²-4x
=6x-8+5x²
=5x²+6x-8
D=(x+3)²
=x²+2x ×3+3²
=x²+6x+9
E=(4+5x)²
=16+40x+25x²
=25x² × 40x+16
F=(-2y+5)²
=(5-2y)²
=25-20y+4y²
=4y²-20y+25
j'espère que ça t'aide je vais continuer
