Solve for b
b=34-a^{2}
Solve for a
a=\sqrt{34-b}
a=-\sqrt{34-b}\text{, }b\leq 34
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a^{2}+b=34
Swap sides so that all variable terms are on the left hand side.
b=34-a^{2}
Subtract a^{2} from both sides.
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