Whakaoti i te {l}{A=pir^2}{a=r^2}{text{Solvefor}btext{where}}{b=a}

$$\left. \begin{array} { l } { A = \pi r ^ {2} }\\ { a = r ^ {2} }\\ { \text{Solve for } b \text{ where} } \\ { b = a } \end{array} \right.$$

Whakaoti mō A, r, a, b (complex solution)

$$r=\sqrt{b}\text{, }A=\pi b\text{, }a=b\text{, }b\in \mathrm{C}$$

$$r=-\sqrt{b}\text{, }A=\pi b\text{, }a=b\text{, }b\in \mathrm{C}$$

Whakaoti mō A, r, a, b

$$r=-\sqrt{b}\text{, }A=\pi b\text{, }a=b\text{, }b\geq 0$$

$$r=\sqrt{b}\text{, }A=\pi b\text{, }a=b\text{, }b\geq 0$$