Q. 1.) Which equation has 1 - i as a solution?(1) x2+2x−2=0(3) x2−2x−2=0(2) x2+2x+2=0(4) x2−2x+2=0
Understand the Problem: Step Title: Understand the ProblemConcise Step Description: Determine what is being asked in the problem.Question Prompt: Which equation has 1−i as a solution?
Apply Conjugate Root Theorem: Step Title: Apply the Conjugate Root TheoremConcise Step Description: Use the Conjugate Root Theorem, which states that if a polynomial has real coefficients and a complex number a+bi is a root, then its conjugate a−bi is also a root.Calculation: Since 1−i is a root, the conjugate 1+i must also be a root.
Test Each Equation: Step Title: Test Each EquationConcise Step Description: Substitute 1−i into each equation to see which one is satisfied.Calculation for Equation (1): (1−i)2+2(1−i)−2=0Calculation: (1−2i+i2)+2−2i−2=0Calculation: (1−2i−1)+2−2i−2=0Calculation: −2i+2−2i=0Calculation: −4i+2=0