Multiple Choice! Algebra 2!
What is the number of real solutions?
-11x^2=x+11
A) cannot be determined
B) one solution
C) two solutions
D) no real solutions
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OpenStudy (agent0smith):
First get it equal to zero (get everything on one side)
Then find the discriminant.
OpenStudy (otonogold):
11x^2+x+11=0
OpenStudy (agent0smith):
For ax^2+bx+c = 0, the discriminant is b^2-4ac
If it is positive, there are 2 real solutions
If it's zero, there is 1 real solution
If it's negative, there's 2 non-real complex solutions
OpenStudy (otonogold):
1 real solution?
OpenStudy (agent0smith):
\[\large 11x^2+x+11=0\] compare to\[\large ax^2 +bx+c=0\]
find the value of \[\large b^2-4ac\]
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OpenStudy (agent0smith):
What are a, b and c in your equation?
OpenStudy (otonogold):
-484
OpenStudy (agent0smith):
Did you forget the b^2? b is 1, a is 11, c is 11
so\[\large 1^2 - 4*11*11 = -483\]
OpenStudy (otonogold):
yes so no
solution
OpenStudy (otonogold):
?
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