PreCalcPlease check my answerI think its correc
posted by Sheila on .
Could someone please check theseI had tried one last night but it was really wrong so I'm been workinghopefully these are correct.
What are the roots of the equation and answers have to be simplified
2x^2 + 5x10 =0
2x^2 + 5x10+10=0+10
2x^2 + 5x = 10
2x^2 + 5x/2 = 10/2
2x^2/2 + 5x/2 = 5
x^2 + 5/2x = 5
(5/2 * 1/2)^2 = 5/4^2
x^2 + 5/2x + (5/4)^2 = 5 + (5/4)^2
(x+5/4)^2 = 105/16
x + 5/4 = +minus sqrt 105/16 = sqrt 3^1 * 5^1*7^1 = sqrt 105/4
x= 5/4 + sqrt105/4 or x= 5/4  sqrt 105/4 Is this correct and simplified thank you

In google type:
quadratic equation online
When you see list of results click on:
Free Online Quadratic Equation Solver:Solve by Quadratic Formula
When page be open in rectangle type:
2x^2 + 5x = 10
and click option:
solve it!
You wil see solution stepbystep.