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If 2x^2 - 8 = 0, what is x?
Practice Questions
Q1
If 2x^2 - 8 = 0, what is x?
x = 2
x = -2
x = 4
x = -4
Questions & Step-by-Step Solutions
If 2x^2 - 8 = 0, what is x?
Steps
Concepts
Step 1: Start with the equation 2x^2 - 8 = 0.
Step 2: Add 8 to both sides of the equation to get 2x^2 = 8.
Step 3: Divide both sides of the equation by 2 to simplify it, resulting in x^2 = 4.
Step 4: Take the square root of both sides to find x. This gives you x = 2 and x = -2.
Quadratic Equations
– The question tests the ability to solve a simple quadratic equation by isolating the variable.
Square Roots
– The question assesses understanding of taking square roots and recognizing both positive and negative solutions.
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