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** Step-by-step Solution **

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We need to isolate the dependent variable , we can do that by simultaneously subtracting $-10$ from both sides of the equation

Learn how to solve quadratic equations problems step by step online.

$2\left(x^2+9\right)=10$

Learn how to solve quadratic equations problems step by step online. Solve the quadratic equation 2(x^2+9)-10=0. We need to isolate the dependent variable , we can do that by simultaneously subtracting -10 from both sides of the equation. Divide both sides of the equation by 2. Simplifying the quotients. Divide 10 by 2.

** Final answer to the problem

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