Bytelearn - cat image with glassesAI tutor

Welcome to Bytelearn!

Let’s check out your problem:

Express as a complex number in simplest a+bi form:

(-9-6i)/(-5+2i)
Answer:

Express as a complex number in simplest a+bi form:\newline96i5+2i \frac{-9-6 i}{-5+2 i} \newlineAnswer:

Full solution

Q. Express as a complex number in simplest a+bi form:\newline96i5+2i \frac{-9-6 i}{-5+2 i} \newlineAnswer:
  1. Multiply by Conjugate: To simplify the complex fraction (96i)/(5+2i)(-9-6i)/(-5+2i), we need to eliminate the imaginary part from the denominator. We do this by multiplying both the numerator and the denominator by the conjugate of the denominator. The conjugate of (5+2i)(-5+2i) is (52i)(-5-2i).
  2. Expand Numerator: Now, we multiply the numerator and the denominator by the conjugate of the denominator: ((96i)×(52i))/((5+2i)×(52i))((-9-6i) \times (-5-2i)) / ((-5+2i) \times (-5-2i)).
  3. Calculate Numerator: First, we'll expand the numerator:\newline(96i)(52i)=(95)+(92i)+(6i5)+(6i2i)(-9-6i) * (-5-2i) = (-9 * -5) + (-9 * -2i) + (-6i * -5) + (-6i * -2i).
  4. Combine Like Terms: Now, we calculate the products in the numerator:\newline45+18i+30i+12i245 + 18i + 30i + 12i^2.\newlineSince i2=1i^2 = -1, we replace 12i212i^2 with 12-12:\newline45+18i+30i1245 + 18i + 30i - 12.
  5. Expand Denominator: Combine like terms in the numerator: \newline(4512)+(18i+30i)=33+48i(45 - 12) + (18i + 30i) = 33 + 48i.
  6. Calculate Denominator: Next, we'll expand the denominator: \newline(5+2i)(52i)=(55)+(52i)+(2i5)+(2i2i)(-5+2i) * (-5-2i) = (-5 * -5) + (-5 * -2i) + (2i * -5) + (2i * -2i).
  7. Combine Like Terms: Now, we calculate the products in the denominator: 2510i10i+4i225 - 10i - 10i + 4i^2. Again, since i2=1i^2 = -1, we replace 4i24i^2 with 4-4: 2510i10i425 - 10i - 10i - 4.
  8. Simplify Numerator and Denominator: Combine like terms in the denominator: \(25 - 44) - (1010i - 1010i) = 2121\
  9. Divide Numerator by Denominator: Now we have the simplified numerator and denominator:\newlineNumerator: 33+48i33 + 48i\newlineDenominator: 2121\newlineWe divide both parts of the numerator by the denominator to get the complex number in a+bia+bi form:\newline(3321)+(48i21)(\frac{33}{21}) + (\frac{48i}{21}).
  10. Simplify Complex Number: Simplify both parts of the complex number: 3321\frac{33}{21} simplifies to 117\frac{11}{7} and 4821\frac{48}{21} simplifies to 167\frac{16}{7}. So, the complex number in a+bia+bi form is: (117)+(167)i(\frac{11}{7}) + (\frac{16}{7})i.

More problems from Convert complex numbers between rectangular and polar form