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We need to isolate the dependent variable , we can do that by simultaneously subtracting $8$ from both sides of the equation
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$2x^2+8-8=0-8$
Learn how to solve quadratic equations problems step by step online. Solve the quadratic equation 2x^2+8=0. We need to isolate the dependent variable , we can do that by simultaneously subtracting 8 from both sides of the equation. Canceling terms on both sides. Divide both sides of the equation by 2. Simplifying the quotients.