3. Divide and express the result in' standard form: _ 5 +4i - 4 1 Multiply the numerator and the denominator by the II ' conjugate of the denominator, 4 + i. ' 5+4: (5+4i). (4+0 4-1' (4-1) (4+i) _ 20+5i+l6i+4i2 16+] _ 20+2h'+4(-l) ' 16+! _16+21i ' 17 16 21, + l "17 17 r'muam a. mu