Solve the quadratic equation .
Answer and explanation
Correct answer: D.
- Step 1: Factorize the quadratic expression : find two numbers that multiply to and sum to . These are and . Rewrite as .
- Step 2: Set each factor equal to zero: , and . Thus, the roots are and .
Answer
.
Why not the others: '' reverses the signs of the roots; '' incorrectly factors the equation; '' results from adding roots rather than factorizing correctly.
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