Computer organization ,self doubt

Question

X= (a+b)*(c+d) variables are in the memory execute on a register -register cpu

Then how many 2 address and 3 address instructions requare ..

 

Explain please

Answer 1

X= (a+b)*(c+d)

For two address

Add a b

Add c d

Mul a c

store  a X

For three address(Opcode store_operand operand operand)

Add a a c

Add c c d

Mul X a c

It may be more reducible .