SOLUTION: x^2 + 5x+ 4=0 answer:x=-1 or -4 need a full break down of how my text book got this answer

Question 184812: x^2 + 5x+ 4=0

answer:x=-1 or -4
need a full break down of how my text book got this answer
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation.

Notice we have a quadratic equation 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 Combine like terms.

or Simplify.

So the answers are or

RELATED QUESTIONS
18x^2 +9x + 1=0 answer: x= -1/3 or -1/6 need a full break down of how my text (answered by jim_thompson5910)

4x^2 - 8x - 5=0 answer x= -1/2 or 5/2 need a full break down of how my text... (answered by solver91311,josmiceli)

x^2 + 2x= 3/4=0 answer x= -3/2 or -1/2 need a full break down of how my book... (answered by Alan3354)

x^4 - x^3 - 9x^2 +14x - 4/ x^2 -3x + 1 answer:x^2 + 2x - 4 need a full break... (answered by Mathtut)

solve 2r^2 + 3r-1=0 answer: -3 + sqrt 17/4, -3-sqrt 17/4 need a full break down... (answered by yuendatlo)

2x^2 - 2/3x- 1/6=0 answer: x= - 1/6 or 1/2 need a break down of how my... (answered by Mathtut)

2x^2 - 9x -5=0 answer: x= -1/2 or 5 need a break down of how my text book got... (answered by checkley77)

2x^2- 2/3x - 1/6 =0 answer: x= -1/6 or 1/2 need a break down of why my text... (answered by Alan3354,nerdybill)

1=3x^2+ 2x answer x= -1 or 1/3 need a break down of how my text book got this... (answered by Mathtut)