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Solve for x: x^2 - 9 = 0.
Solve for x: x^2 - 9 = 0.
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Practice Questions
1 question
Q1
Solve for x: x^2 - 9 = 0.
-3
3
0
±3
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The equation factors to (x - 3)(x + 3) = 0, giving solutions x = 3 and x = -3.
Questions & Step-by-step Solutions
1 item
Q
Q: Solve for x: x^2 - 9 = 0.
Solution:
The equation factors to (x - 3)(x + 3) = 0, giving solutions x = 3 and x = -3.
Steps: 7
Show Steps
Step 1: Start with the equation x^2 - 9 = 0.
Step 2: Recognize that x^2 - 9 is a difference of squares, which can be factored.
Step 3: Factor the equation into (x - 3)(x + 3) = 0.
Step 4: Set each factor equal to zero: x - 3 = 0 and x + 3 = 0.
Step 5: Solve the first equation: x - 3 = 0 gives x = 3.
Step 6: Solve the second equation: x + 3 = 0 gives x = -3.
Step 7: The solutions are x = 3 and x = -3.
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