Use the quadratic formula to find the roots of the equation. 2x2 - 28x + 98 = 0
A.{-7, 7}
B.{7}
C.{-2, 49}
D.no real number solution

Question

Use the quadratic formula to find the roots of the equation. 2x2 - 28x + 98 = 0
A.{-7, 7}
B.{7}
C.{-2, 49}
D.no real number solution

eyust707 · Answer

okay so the "roots" are the x's that you can plug in to make the left side equal 0

eyust707 · Answer

you have learned roots when there was no number in from of x^2.

eyust707 · Answer

front*
but thats okay cause we can get rid of it using a lil trick

campbell_st · Answer

for a quadratic  ax^2 + bx + c = 0

the general quadratic formula is

 $$x = (-b \pm \sqrt{b^2 - 4ac})/(2a)$$

in your question identify a, b, c and substitute

eyust707 · Answer

the quadratic will also work, but this is my method:
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