If and are the roots of the quadratic equation , what is the value of ?
Answer and explanation
Correct answer: D.
- Step 1: Multiply the quadratic equation by : .
- Step 2: Since and satisfy , they must also satisfy , which gives and .
- Step 3: Compute : and . Therefore, .
Answer
.
Why not the others: is just a single term ; is ; miscalculates as .
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