Helen is solving a quadratic equation. She wants to find the value of x by taking the square root of both sides of the equation. Which equation allows her to do this?

1) x^2+ 24x + 144 = 17

2) x^2 + 7x + 12 = 34

3) x^2+ 7x + 49 = 10

4) x^2+ 25x + 10 = 20

1)

Step-by-step explanation:

The answer is 1) because the left side in the equation

can be represented a perfect square:

so we have that the original equation becomes:

and then, taking the square root of both sides of the equation:

±

±

we are left with an equation where we can find the values of x.

so we clear for x and we get:

±

thus,  the two values of x are:

not enough information

step-by-step explanation:

we cannot know this, because the other students could have handed out 10 flyers, or they could have handed out 100. one way, the mean would go up, and another way, the mean would go down.