Define extended ADD with carry?

Define extended ADD with carry?

The instruction is ADC or “add with carry.” Normal addition has two operands and the second operand is added to the firstoperand. However ADC has three operands. The third implied operand is the carry flag. The ADC instruction is specifically placed for extending the capability of ADD. Numbers of any size can be added using a proper combination of ADD and ADC. ADC first adds the carry flag to AX and then adds BX to AX. Therefore the last carry is also included in the result.