Solve in R :

$\displaystyle x^{2}-19\left[x\right]+88=0$

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- Oct 31st 2009, 01:29 AMdhiabEntire function
Solve in R :

$\displaystyle x^{2}-19\left[x\right]+88=0$ - Oct 31st 2009, 01:42 AMMonocerotis
http://www.mathhelpforum.com/math-he...c806aaa8-1.gif

You could factor the function, and solve for x, this one happens to factor easily.

x^2 - 11x - 8x + 88

(x - 8)(x - 11) = 0

x - 8 = 0

x = 0 + 8

Next

x - 11 = 0

x = 0 + 11

There are your two x-coordinates.

x^2 - 19x + 88 = 0

or you could just plug in the values into the quadratic equation, the function is already in standard form.

a = 1

b = -19

c = 88

http://i34.tinypic.com/3497aer.jpg

Just a note when entering the values, keep each value in a bracket with the original sign from the equation outside of the bracket.

for example the first b value that shows up in the situation would be -b, which when the values are plugged in would be -(-19), which is 19.