(X+3).(X+1) = x²+x+3x+3 = x²+4x+3
(2X+3).(3X+1) = 6x²+2x+9x+3 = 6x²+11x+3
(X-7).(X+3) = x²+3x-7x-21 = x²-4x-21
(2X+4).(2X-1) = 4x²-2x+8x-4 = 4x²+6x-4
(X-3).(X-2) = x²-2x-3x+6 = x²-5x+6
(5X-2).(3X+1) = 15x²+5x-6x-2 = 15x²-x-2
(6X-2).(2X+1) = 12x²+6x-4x-2 = 12x²+2x-2
(X-3).(X-4) = x²-4x-3x+12 = x²-7x+12
11/09/22
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Verified answer
(X+3).(X+1) = x²+x+3x+3 = x²+4x+3
(2X+3).(3X+1) = 6x²+2x+9x+3 = 6x²+11x+3
(X-7).(X+3) = x²+3x-7x-21 = x²-4x-21
(2X+4).(2X-1) = 4x²-2x+8x-4 = 4x²+6x-4
(X-3).(X-2) = x²-2x-3x+6 = x²-5x+6
(5X-2).(3X+1) = 15x²+5x-6x-2 = 15x²-x-2
(6X-2).(2X+1) = 12x²+6x-4x-2 = 12x²+2x-2
(X-3).(X-4) = x²-4x-3x+12 = x²-7x+12
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11/09/22