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HELP math problem

1. Determine whether the following equations have a solution or not? Justify your answer.

a) x2 + 3x - 15 = 0
b) x2 + x + 4 = 0
c) x2 – 4x - 7 = 0
d) x2 – 8x + 16 = 0
e) 2x2 - 3x + 7 = 0
f) x2 – 4x - 77 = 0
g) 3x2 - 7x + 6 = 0
h) 4x2 + 16x + 16 = 0


2. If x = -3 and x = 4, then form a quadratic equation.


3. What type of solution do you get for quadratic equations where D < 0? Give reasons for your answer. Also provide an example of such a quadratic equation and find the solution of the equation.


4. Create a real-life situation that fits into the equation (x + 3)(x - 5) = 0 and express the situation as the same equation.

Answer Question
 
Anonymous

Asked by Anonymous at 5:11 PM on Feb. 6, 2009 in Teens (13-17)

Answers (5)
  • LOL,is this your homework?

    Kat122

    Answer by Kat122 at 5:14 PM on Feb. 6, 2009

  • -b plus or minus square root b squared- 4ac all over 2a

    there is a quadratic formula song to help you memorize it
    Blaire23

    Answer by Blaire23 at 5:14 PM on Feb. 6, 2009

  • ok hun i googled help with math problems and found a website that hopefully will help you try mathway.com or webmath.com i hope these help
    SThompson21

    Answer by SThompson21 at 5:15 PM on Feb. 6, 2009

  • and this is why i sucked at math....
    YamahaGoddess

    Answer by YamahaGoddess at 5:15 PM on Feb. 6, 2009

  • You can also google Saxon Math and get live help over the phone, I think. At least I did with 3 of my older kids yrs ago. I homeschooled them. You can also buy an algebraic calculator that will help solve those problems for you.
    1daughter5sons

    Answer by 1daughter5sons at 5:20 PM on Feb. 6, 2009

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