Solve x2 − 7x = −13.

A) x equals quantity of negative 7 plus or minus I square root of 6 all over 2
B) x equals quantity of negative 7 plus or minus I square root of 3 all over 2
C) x equals quantity of 7 plus or minus I square root of 6 all over 2
D) x equals quantity of 7 plus or minus I square root of 3 all over 2

Respuesta :

Answer:

The correct answer option is B) x equals quantity of negative 7 plus or minus I square root of 3 all over 2.

Step-by-step explanation:

We are given the following quadratic equation:

[tex]x^2-7x=-13[/tex]

Taking the constant on the same side as the variable to get:

[tex]x^2-7x+13=0[/tex]

Since, it cannot be factorized so we will use the quadratic formula:

x = [tex]\frac{-2+-\sqrt{b^2-4ac} }{2a}[/tex]

Substituting in the values of a, b and c in the above formula to get:

x= [tex]\frac{-(-7)+-\sqrt{(-7)^2-4(1)(13)} }{2(1)}[/tex]

x = [tex]\frac{7}{2} + i\frac{\sqrt{3} }{2}[/tex], x = [tex]\frac{7}{2} - i\frac{\sqrt{3} }{2}[/tex]

Therefore, the correct answer option is B) x equals quantity of negative 7 plus or minus I square root of 3 all over 2.

Answer: the actual correct answer is D

Step-by-step explanation: i know the test answers because i am in flvs too

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