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Mathematics 14 Online
OpenStudy (anonymous):

How many solutions does the following quadratic equation have? Write your answer as an integer. 9x^2 - 24x + 16 = 0

OpenStudy (imstuck):

It will have the same number of solutions as the power to which it is raised. The highest power is 2, so it has 2 solutions. This is an "always" type of rule.

OpenStudy (radar):

\[(3x- 4)^{2}=0\]

OpenStudy (rock_mit182):

you could find the determinant by aplying this equation: \[b ^{2}-4ac =\]

OpenStudy (radar):

Double root of 4/3

OpenStudy (rock_mit182):

for an equation:\[ax ^{2} + bx +c = 0\]

OpenStudy (rock_mit182):

where a, b, and c are constant coefficients

OpenStudy (radar):

Double root means two identical solutions, whether you would call that one solution or two depends on your teacher lol. I would call it 1 solution of 4/3.

OpenStudy (rock_mit182):

for our equation: a = 9, b=-24 c=16, pluggin that values, in order to find the determinant: \[(-24)^{2}-4(9)(16) = ?\]

OpenStudy (rock_mit182):

\[\Delta > 0\] two real solutions \[\Delta = 0\] one real solution \[\Delta < 0\] no real solutions where\[\Delta = determinant\]

OpenStudy (radar):

A graph of the function reveals a parabola with one x axis intercept, and that is at the vertex.|dw:1407620739783:dw|

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