Question

Solve x2 − 7x = −13.

Answer 1

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:

$x^2-7x=-13$

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

$x^2-7x+13=0$

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

x = $\frac{-2+-\sqrt{b^2-4ac} }{2a}$

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

x= $\frac{-(-7)+-\sqrt{(-7)^2-4(1)(13)} }{2(1)}$

x = $\frac{7}{2} + i\frac{\sqrt{3} }{2}$, x = $\frac{7}{2} - i\frac{\sqrt{3} }{2}$

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 2

Answer: the actual correct answer is D

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