Pre-Calc-Please check my answer-I think I have it

Could someone please check these-I had tried one last night but it was really wrong so I'm been working-hopefully these are correct.

What are the roots of the equation and answers have to be simplified
2x^2 + 5x-10 =0
2x^2 + 5x-10+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 Someone suggested a site that will do it but I want to learn on my own

  1. 👍 0
  2. 👎 0
  3. 👁 199
  1. 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 step-by-step.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. English - punctuation

    which of the following sentences is punctuated correctly? A. The horse rode to our house, the beach, and around the church, before he started to tire. B. The strong heavyset fighter won his first fight, and he was featured in the

    asked by John on January 6, 2016
  2. Trigonometry

    Find the value of x. Round to the nearest tenth. The diagram is not drawn to scale. The adjacent is 12cm wide and the angle of the hypotenuse is at 35 degrees. The opposite is x. I'm posting this here because I want to know what I

    asked by A Victim of Bullying on April 10, 2020
  3. Basic Math

    Bill and Sue both work at night. Bill has every sixth night off and Sue has every eighth night off. If they are both off tonight, how many nights will it be before they are both off again?

    asked by Mike on January 31, 2011
  4. English

    please check my answers 1.Mr.Peters comes to bed one night and finds leita calling out in her sleep. How does this scene reveal her internal conflict? her dream, she is talking of her fear of leaving Mr.Peters her dream,

    asked by kim on March 26, 2019
  5. Language Arts

    Harlem Night Song This is the poem Come, Let us roam the night together Singing. I love you. Across The Harlem roof-tops Moon is shining. Night sky is blue. Stars are great drops Of golden dew. Down the street A band is playing. I

    asked by Callie on January 23, 2015
  1. ELA

    which of the following citations in a works cited page uses proper MLA style? A paul smith the night on the river New york penguin 1987 print. B the night on the river new york penguins 1987 print. C smith paul the night on the

    asked by gregory on January 29, 2018
  2. math

    At dinner one night Sean paid a total of $54.32. The tax was 8%, and he left a 20% tip on the check and tax. Which equation can be used to find the amount of the check BEFORE tax and tip?

    asked by Sam on February 26, 2019
  3. Geometry

    Mark wants to visit the 10 colleges he is considering attending. He can only spend the night at 3 of them. What is the probability that he spends a night at Rutgers University, a night at the University of Miami, and a night at

    asked by Boboerto on May 6, 2016
  4. Language Arts

    Directions: replace the bold faced word with a contraction. 1. We will(bold faced) see you t the English class next week! Answer: We'll 2. There is (bold faced) no milk in the refrigerator. Answer: There's 3. There will (bold

    asked by Patrick on March 2, 2016
  5. algebra

    Solve for s in this equation. Depreciation. D=C-s/n This is my answer D-C=C-s/n-c D-C=-s/n -n(D-C)=-s/n*(-n) -nD+nC=s s=n(C-D) Please chack to see if this is correct Looks fine to me. A slightly shorter (by 2 lines) rearragement

    asked by jessica on April 4, 2007
  6. maths

    A vampire enters a town and bites 2 person every night. The bitten 2 persons grows in to two big vampires and bites 4 persons the next night. These 4 vampires bites 6 people the next night and the 6 bites 8 and so

    asked by Anonymous on August 8, 2011

You can view more similar questions or ask a new question.