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19.10.2019 •
Mathematics
Which statement about the following equation is true?
2x^2 – 9x + 2 = –1
a.) the discriminant is less than 0, so there are two real roots.
b.) the discriminant is less than 0, so there are two complex roots.
c.) the discriminant is greater than 0, so there are two real roots.
d.) the discriminant is greater than 0, so there are two complex roots.
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Ответ:
Option C is correct that is the discriminant is greater than 0, so there are two real roots.
Step-by-step explanation:
We have been given the quadratic equation:
We will rearrange the like terms and so the equation will become:
We will solve the above quadratic equation by discriminant rule
Where,![D=b^2-4ac](/tpl/images/0334/6394/6507e.png)
We will compare the equation with general quadratic equation
Here, a=2,b= -9 and c=3 on substituting the values we get:
Therefore, Option C is correct that is the discriminant is greater than 0, so there are two real roots.
Ответ:
aA F are the only ones yes
Step-by-step explanation: draw a vertical line if it touches more than once it's not a function