What is (ab) the whole conjugate

Question

Here no plus or minus is there, then how could we able to find conjugate?

Answer 1

When we find the conjugate of two terms, we change

the sign of the 2nd term.

The conjugate of x+y is x-y

The conjugate of a + bi is a - bi

x = x+0 so the conjugate of x is x-0 = x

 

This is the reason we only use the conjugate when dealing with 2 terms

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The conjugate of ab

ab + 0

conjugate: ab - 0 = ab

 

A single term doesn't really have a conjugate.

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If this was the conjugate of a+b it would be a-b

Answer 2

The complex conjugate of a product of two complex numbers is the product of the two complex conjugates.

 

(ab)* = (a*)(b*)