anonymous
  • anonymous
use the discriminant to find the number and kind of solutions for the equation 2x2 + 7x = 10
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
The answer is this : 4+7x=10 7x=10-4 7x=6 x=6/7 Did you want it ?!:)
anonymous
  • anonymous
i wrote that equation wrong.. it is \[2x ^{2} + 7x = 10\]
anonymous
  • anonymous
Is this your question ?

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anonymous
  • anonymous
yes
anonymous
  • anonymous
Ok ! We have : 2x^2+7x-10=0
anonymous
  • anonymous
It s a 2th equetion ! You should find X in this way but remamber we have -x and +x .!
anonymous
  • anonymous
Firs find \[Deltab\]: To find it can use this formula : Delta = b^2-4ac 2=a -10=c 7=b Then to find x : Understand ?
anonymous
  • anonymous
@annalizz12
anonymous
  • anonymous
D=b^2-4ac=7^2-4*2*(-10)=49+80=139 If D=0 roots are real and equal if D is positive and a perfect square,then roots are real rational and different. If D is positive and not a perfect square roots are real ,irrational and different. If D is negative, then roots are not real,they are imaginary.
anonymous
  • anonymous
hey tthe answer is that u have to ask ur theacher just kidding lol:)
anonymous
  • anonymous
correction 49+80=129
anonymous
  • anonymous
ok ok ok ok ok ok ok ok ok
anonymous
  • anonymous
you can see out of the four options which matches.with your question.
anonymous
  • anonymous
yes ic

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