Math Problem Statement

Find the values of x and y when x(3 − 2i) + y(10 − 5i) − (1 − 4i) = 0.

Solution

The problem requires solving for xx and yy such that:

x(32i)+y(105i)(14i)=0.x(3 - 2i) + y(10 - 5i) - (1 - 4i) = 0.

Step-by-Step Solution:

  1. Rewrite the equation:

    Expand and group the real and imaginary terms:

    x(32i)+y(105i)(14i)=0.x(3 - 2i) + y(10 - 5i) - (1 - 4i) = 0.

    This becomes:

    (3x+10y1)+(2x5y+4)i=0.(3x + 10y - 1) + (-2x - 5y + 4)i = 0.

  2. Separate real and imaginary parts:

    The equation will hold true if the real and imaginary parts are both zero:

    3x+10y1=0(real part).3x + 10y - 1 = 0 \quad \text{(real part)}. 2x5y+4=0(imaginary part).-2x - 5y + 4 = 0 \quad \text{(imaginary part)}.

  3. Solve the system of linear equations:

    The two equations are:

    3x+10y=1(Equation 1).3x + 10y = 1 \quad \text{(Equation 1)}. 2x5y=4(Equation 2).-2x - 5y = -4 \quad \text{(Equation 2)}.

    Multiply Equation 2 by 2 to eliminate yy: 4x10y=8.-4x - 10y = -8.

    Add it to Equation 1: (3x4x)+(10y10y)=18.(3x - 4x) + (10y - 10y) = 1 - 8.

    Simplify: x=7x=7.-x = -7 \quad \Rightarrow \quad x = 7.

  4. Substitute x=7x = 7 into Equation 1:

    3(7)+10y=1.3(7) + 10y = 1. 21+10y=110y=20y=2.21 + 10y = 1 \quad \Rightarrow \quad 10y = -20 \quad \Rightarrow \quad y = -2.

Final Answer:

x=7,y=2.x = 7, \quad y = -2.


Would you like additional clarification or further details?

Expanding Questions:

  1. How would the solution differ if the coefficients were real numbers only?
  2. How can you verify the solution by substituting the values back into the equation?
  3. What happens if one of the equations is a multiple of the other?
  4. Can this problem be solved geometrically using the complex plane?
  5. How would the system behave if the determinant of the coefficient matrix were zero?

Tip:

When solving for complex coefficients, always separate real and imaginary parts carefully to avoid missing terms.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Complex Numbers
Algebra
Linear Systems

Formulas

Separation of real and imaginary parts in complex equations

Theorems

System of Linear Equations Theorem

Suitable Grade Level

Grades 11-12 or Introductory College Level