SOLUTION: Solve for x. Simplify 4x^2 -5=-21

Question 559911: Solve for x. Simplify 4x^2 -5=-21
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation.

Get every term to the left side.

Combine like terms.

Notice that the quadratic is in the form of where , , and

Let's use the quadratic formula to solve for "x":

Start with the quadratic formula

Plug in , , and

Square to get .

Multiply to get

Subtract from to get

Multiply and to get .

Take the square root of to get .

or Break up the expression.

or Break up the fraction for each case.

or Reduce.

or Simplify.

So the solutions are or
-------------------------------------------------------------------------------------------------
If you need more help, email me at jim_thompson5910@hotmail.com

Also, please consider visiting my website: http://www.freewebs.com/jimthompson5910/home.html and making a donation. Thank you

Jim
-------------------------------------------------------------------------------------------------

RELATED QUESTIONS
x^2-4x=21 solve for... (answered by checkley79,nerdybill)

Simplify... (answered by Edwin McCravy)

21)Solve the equation for x. 3/4x-1/2=-8 Type an integer or fraction. Simplify your (answered by rfer)

simplify fully... (answered by Alan3354)

Solve equation by factoring x^2-4x=21 standard Form x^2-4x-21=0 Thanks for your... (answered by solver91311)

Solve for x 5(x-100)=2(x-100)+21 (answered by rfer)

21 solve for x:... (answered by 303795)

Solve for x.... (answered by )

Solve for X... (answered by )