dix123
  • dix123
how to find solutions of a quadratic trinomial with a discriminant of 40.
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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dix123
  • dix123
Plssssssss helppppppppppp
UnkleRhaukus
  • UnkleRhaukus
A general quadratic polynomial: \[ax^2+bx+c=0\] The discriminant \(\Delta\): \[\Delta= b^2-4ac\]
dix123
  • dix123
but how do you get the solutions if the discriminant is a positive number, but not a perfect square. I mean I know it has 2 irrational solutions how would you solve it?

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UnkleRhaukus
  • UnkleRhaukus
the solutions are given from the quadratic formula \[x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}=\frac{-b\pm\sqrt{\Delta}}{2a}\]
dix123
  • dix123
Thank you. That really helps
UnkleRhaukus
  • UnkleRhaukus
If you found the discriminant to be positive, +40: then then irrational roots will be \[x=\frac{-b\pm\sqrt{40}}{2a}\\ \quad=\frac{-b\pm2\sqrt{10}}{2a}\\\] \[x=\frac{-b+2\sqrt{10}}{2a},\quad \frac{-b-2\sqrt{10}}{2a}\\ \quad =\qquad\qquad\quad,\]
dix123
  • dix123
Thank you!!!!

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