Solve the System for X and Y Using Cramer's Rule $$\begin{array} { l } a x + y = b \\x + b y = a\end{array}$$

question 421

Multiple Choice

Solve the system for x and y using Cramer's rule. Assume a and b are nonzero constants.
- $$\begin{array} { l } a x + y = b \\x + b y = a\end{array}$$

• A) \(\left\{ \left[ \frac { a ^ { 2 } - b } { a b - 1 } , \frac { b ^ { 2 } - a } { a b - 1 } \right) \right\}\)
• B) \(\left\{ \left\{ \frac { a ^ { 2 } + b } { a b - 1 } , \frac { b ^ { 2 } + a } { a b - 1 } \right) \right\}\)
• C) \(\left\{ \left[ \frac { b ^ { 2 } - a } { a b - 1 } , \frac { a ^ { 2 } - b } { a b - 1 } \right) \right\}\)
• D) \(\left\{ \left( \frac { a b - 1 } { b ^ { 2 } - a } , \frac { a b - 1 } { a ^ { 2 } - b } \right) \right\}\)

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