Question 1198995

If {{{(1-i)(3+i) = a + bi}}}. What is the value of {{{a + b}}}


{{{(1-i)(3+i) = a + bi}}}

{{{1*3+1*i-i*3-i*i = a + bi}}}

{{{3+i-3i-i^2 = a + bi}}}

{{{3-2i-(-1) = a + bi}}}

{{{3-2i+1 = a + bi}}}

{{{4 - 2i= a + bi}}}

=>{{{a=4}}},{{{ b=2}}}

 the value of{{{ a + b=4+2=6}}}