Question

Solve using the quadratic formula. Approximate answers to the nearest tenth.
x^2-4x-7=0

Answer 1

Do you know the quadratic formula?

Answer 2

Yeah, but im just confused on how to turn it into a decimal.

Answer 3

What do you have that you need to turn into a decimal?

Answer 4

well the thing says approximate to the nearest tenth

Answer 5

Yes, I understand. Once you used the quadratic formula, what solutions did you get?

Answer 6

First use the quadratic formula. You'll get two solutions with square roots in them. Then use a calculator to find decimal approxinmations of the solutions.

Answer 7

Okay I did that, but how do I write it?

Answer 8

cuz the decimal is 3.32

Answer 9

\[\left\{x=2-\sqrt{11},x=2+\sqrt{11}\right\} \]\[\{x=-1.3,x=5.3\} \]

Answer 10

What did you get as solutions of the quadratic formula?