(4d - 3)(4d + 3) - (4d + 3)² = (4d + 3)(4d - 3 - 4d - 3) = - 6 * (4d + 3)
- 6 * ( 4 * 50 + 3) = - 6 * 203 = - 1218
(4d+3)(4d-3-4d-3)=-6*(4d+3)=-6*203=
-1218
(4d - 3)(4d + 3) - (4d + 3)² = (4d + 3)(4d - 3 - 4d - 3) = - 6 * (4d + 3)
- 6 * ( 4 * 50 + 3) = - 6 * 203 = - 1218