anonymous
  • anonymous
Decide which part of the quadratic formula tells you whether the quadratic equation can be solved by factoring. −b b2 − 4ac 2a Use the part of the quadratic formula that you chose above and find its value, given the following quadratic equation: 2x2 + 7x + 3 = 0
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
@ali2x2
ali2x2
  • ali2x2
Let D = b^2 − 4ac This is known as the discriminant
ali2x2
  • ali2x2
If the discriminant D is a perfect square, then ax^2 + bx + c can be factored

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ali2x2
  • ali2x2
Compare 2x^2 + 7x + 3 to ax^2 + bx + c
ali2x2
  • ali2x2
what are the values of 'a', 'b' and 'c'?
ali2x2
  • ali2x2
a = 2, b = 7 and c = 3
ali2x2
  • ali2x2
So D = b^2 - 4ac D = 7^2 - 4(2)(3) ... Plug in a = 2, b = 7 and c = 3 D = 49 - 24 D = 25
ali2x2
  • ali2x2
is 25 a perfect square?
ali2x2
  • ali2x2
yes or no?
anonymous
  • anonymous
yes
ali2x2
  • ali2x2
so 2x^2 + 7x + 3 can be factored
ali2x2
  • ali2x2
then the ending value is 25
ali2x2
  • ali2x2
they just want the value of b^2 - 4ac
ali2x2
  • ali2x2
you type in 25
ali2x2
  • ali2x2
that's the final value of b^2 - 4ac
ali2x2
  • ali2x2
where a = 2, b = 7 and c = 3
anonymous
  • anonymous
is 25 the final answerr
ali2x2
  • ali2x2
yes thats the final value of b^2 - 4ac where a = 2, b = 7 and c = 3
ali2x2
  • ali2x2
final value : final value of b^2 - 4ac = 25 where :a = 2, b = 7 and c = 3

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