anonymous
  • anonymous
Will give a medal. Need help urgently. Which of the following is a solution of x^2 + 5x = -2?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
P0sitr0n
  • P0sitr0n
\[\frac{-5\pm\sqrt{17}}{2}\] by solving it using the quadratic formula
anonymous
  • anonymous
Can you explain it completely so that I know how to do it in the future?

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P0sitr0n
  • P0sitr0n
Recall that is \[\frac{-b\pm\sqrt{b^2-4ac}}{2a}\], where a is the coefficient of x^2 (1 in our case), b is of x (5 in our case) and c is the constant term (2 in our case, dont forget the total experssion must be = 0)
P0sitr0n
  • P0sitr0n
This will give you two roots, (note the plus / minus)
anonymous
  • anonymous
ok.. then you just solve right @P0sitr0n ?
P0sitr0n
  • P0sitr0n
yep
P0sitr0n
  • P0sitr0n
this formula was derived specifically for this purpose
P0sitr0n
  • P0sitr0n
that said, don't forget to always check that the term under the square root (called the dicriminant) is always positive or zero
P0sitr0n
  • P0sitr0n
basically you only plug in a, b and c into the formula (those coefficients are taken from your equation)

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