1. (X-2) (x+4)
= x (x+4) -2 (x+4)
= x2 +4x -2x -8
= x2 + 2x -8
2. (X+1) (x+6)
= x(x+6) +1 (x+6)
= x2 +6x +x + 6
= x2 +7x +6
3. (X-4)(x+2)
= x(x+2) -4 (x+2)
= x2 + 2x - 4x -8
= x2 -2x -8
4. (X+5)(x-3)
= x(x-3) +5 (x-3)
= x2 -3x +5x -15
= x2 +2x -15
5. (X-6)(x-2)
= x(x-2) -6(x-2)
= x2 -2x -6x +12
= x2 -8x +12
Regards,
ArmyCee:)