Bonsoir,
A = (x + 1)(x+5)
B=(2x+7) (3x+8)
= 6x² +16x +21x + 56
= 6x² +37x = 56
C = (3x + 5)(4+7x)
= 12x +21x² +20 + 35x
= 21x² +47x +20
D = (2x + 1)(x - 5)
= 2x² -10x +x -5
= 2x² -9x -5
E = (x-5) (3x + 7)
= 3x² +7x -15x -35
= 3x² -8x -35
F = (6x + 4) (5-7x)
= 30x -42x² +20 -28x
= - 42x² +2x +20
G=(x-2)(x-7)
= x² -7x -2x +14
= x² -9x +14
H = (2x-6) (4x-1)
= 8x² -2x -24x +6
= 8x² -26x +6
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Bonsoir,
A = (x + 1)(x+5)
B=(2x+7) (3x+8)
= 6x² +16x +21x + 56
= 6x² +37x = 56
C = (3x + 5)(4+7x)
= 12x +21x² +20 + 35x
= 21x² +47x +20
D = (2x + 1)(x - 5)
= 2x² -10x +x -5
= 2x² -9x -5
E = (x-5) (3x + 7)
= 3x² +7x -15x -35
= 3x² -8x -35
F = (6x + 4) (5-7x)
= 30x -42x² +20 -28x
= - 42x² +2x +20
G=(x-2)(x-7)
= x² -7x -2x +14
= x² -9x +14
H = (2x-6) (4x-1)
= 8x² -2x -24x +6
= 8x² -26x +6