Q. Express as a complex number in simplest a+bi form:2−i6−6iAnswer:
Write Given Complex Fraction: Write down the given complex fraction.We have the complex fraction (6−6i)/(2−i) that we want to express in the form a+bi.
Multiply by Conjugate: Multiply the numerator and the denominator by the conjugate of the denominator. The conjugate of (2−i) is (2+i). We multiply both the numerator and the denominator by this conjugate to eliminate the imaginary unit i from the denominator. (2−i)(2+i)(6−6i)(2+i)
Perform Multiplication: Perform the multiplication in the numerator and the denominator.Numerator: (6−6i)(2+i)=12+6i−12i−6i2Denominator: (2−i)(2+i)=4+2i−2i−i2
Simplify Expressions: Simplify the expressions in the numerator and the denominator.Numerator: 12+6i−12i−6i2=12−6i+6 (since i2=−1)Denominator: 4+2i−2i−i2=4+1 (since i2=−1)
Combine Like Terms: Combine like terms in the numerator and the denominator.Numerator: 12−6i+6=18−6iDenominator: 4+1=5
Divide Numerator by Denominator: Divide the numerator by the denominator to get the complex number in a+bi form.(18−6i)/5=18/5−(6i/5)
Write Final Answer: Write the final answer in a+bi form.The complex number in a+bi form is 518−56i, or 3.6−1.2i.
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