SOLUTION: please help me solve and graph this equation: 5x^2-20x-60=0

Question 199679: please help me solve and graph this equation: 5x^2-20x-60=0
Found 2 solutions by Alan3354, jim_thompson5910:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
5x^2-20x-60=0
x^2 - 4x - 12 = 0
(x-8)*(x+4) = 0
x = 8, x = -4
----------------
To graph it, get the FREE software at
www.padowan.dk.com/graph/

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 in the form of where , , and

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

Start with the quadratic formula

Plug in , , and

Negate to get .

Square to get .

Multiply to get

Rewrite as

Add to 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 solutions are or

RELATED QUESTIONS
please help me solve this equation... (answered by Alan3354)
Please help me solve this equation: 5x^2-20x-20=5 It is called completing the square... (answered by jim_thompson5910)
Please help me solve this equation: {{{ 5x^2+x=0... (answered by Fermat)
Please help me solve this equation:... (answered by josmiceli)
please help me solve this equation {{{x^2+20x-9900}}} thank-you (answered by Alan3354,jorel1380)
PLEASE HELP ME SOLVE THIS EQUATION: FIND SLOPE AND Y INTERCEPT, AND GRAPH ON A LINE?... (answered by Earlsdon)
Please help solve this equation y=3x^2-20x VERTEX? (answered by Alan3354,josmiceli,advanced_Learner)
Please help me solve this graph... (answered by ewatrrr)
Please help me solve this equation: {{{ 5x-7=0... (answered by ellygirl5969)