Solve for a
a=7\sqrt{2}\approx 9.899494937
Assign a
a≔7\sqrt{2}
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a=\sqrt{49+7^{2}}
Calculate 7 to the power of 2 and get 49.
a=\sqrt{49+49}
Calculate 7 to the power of 2 and get 49.
a=\sqrt{98}
Add 49 and 49 to get 98.
a=7\sqrt{2}
Factor 98=7^{2}\times 2. Rewrite the square root of the product \sqrt{7^{2}\times 2} as the product of square roots \sqrt{7^{2}}\sqrt{2}. Take the square root of 7^{2}.
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