# math-calculus

posted by .

|x^2-2x-6| = 4. and answer have to be 1+-sqrt3, 1+-sqrt11 i just not get how to get this.

• math-calculus -

| x ^ 2 - 2 x - 6 |= 4

Eliminate the absolute value :

x ^ 2 - 2 x - 6 = 4

OR

x ^ 2 - 2 x - 6 = - 4

When you see list of results click on:

When page be open in rectangle type:

x ^ 2 - 2 x - 6 = 4

and click option: solve it!

You will see solutions of equation :

x ^ 2 - 2 x - 6 = 4

step-bay-step

Then in rectangle type:

x ^ 2 - 2 x - 6 = - 4

and click option: solve it!

You will see solutions of equation :

x ^ 2 - 2 x - 6 = - 4

step-bay-step

Equation :

| x ^ 2 - 2 x - 6 | = 4

has 4 solutions :

1 + sqrt ( 11 )

1 - sqrt ( 11 )

1 + sqrt ( 3 )

and

1 - sqrt ( 3 )

• math-calculus -

thank you very much the site be very very helpful i try to find site like that yesterday and i not find thanks very much.

## Similar Questions

1. ### Calculus

Hi. How can I integrate 1/(X^3 +1) ? Thank you to anyone who can help me :-) Write 1/(x^3 +1) as 1/[(x+1)(x^2-x+1)] Then use integration by parts, letting dv = dx/(x^2 -x +1) u = 1/(x+1) du = log (x+1) v = (2/sqrt3)arctan[(2x-1)/sqrt3]
2. ### math,algebra

can someone help me out factor out this 0=16t^2-122t+180 i have so far this but the last one i am not sure 8(2t^2-14t + ?
3. ### Math

Use the quadratic formula to solve each of the following quadratic equations... 1. 2x^2-5x=3 2. 3x^2-2x+1=0 Rearrange the equation in quadratic formula form. 2x^2 -5x -3 = 0 Then use the formula. Tell me what you don't understand about …

You know how to solve quadratic equations using algebra, graphs and the quadratic formula. Sometimes one method of solving is more convenient than another method. Describe how you would solve each equation. Give reasons for you answers. …
5. ### Algebra

can show me how to do this with out just squaring 3x^(1/2) - x - 6 = 0 how do i do this and solve for x with out just squareing and using quadratic formula. I was never taught the proof of the quadratic formula and would like to know …
6. ### College Math II

Solve by using the quadratic formula. x^2 + 6x + 6 = 0 I am having problems using the quadratic formula to get the right answer. Can someone show me the steps that I use?
7. ### math-calculus

solve equation |x^2-2x-6| using quadratic formula. i not get how to do this and it says quadratic formula.
8. ### Math

Solve for the zeros of the function using the quadratic formula. 3x^2=-4x+6 I know what the quadratic formula is but when I put it into the formula I keep getting an error on the graphing calculator.
9. ### pre-calculus 11

abs x^2/2 -1 =x+3 solve algebraically so if I divide through by 2 i get x^2 -2= 2x+3 simplifying x^2-2x-5 =0 solve by quadratic formula to get =3.449 and -0.445 both of which are extraneous roots if I take negative then I get -x^2 …