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Answer: second option
Step-by-step explanation:
The standard form of a quadratic equation is:
Then, to write the quadratic equation given in the problem in standard form, you must substract 1 from both sides of the equation. Then you have:
Given the quadratic equation above, to find the value of you must substitute:
a=2; b=5 and c=-1 into
Thenrefore, you obtain the following result: