Posted on 09/27/2010 6:56:57 PM PDT by pandemoniumreigns
OK I need some math help anybody.
I hope she’s a H.S. freshman.
Tell her to do her own work.
Yeah, beat me to it :)
Correction...
5 +/- 5*SQRT(10)
Nice work - you beat me to it :)
ya plug it in
-1 does not = 0
She seriously doesn’t know the quadratic equation?
Correction again...
#19 is correct
HTML <"sup"> no quotes.
Now if I only knew how post this with out the quotes.
a = -1
b = 10
c = 10
r = (-b +/- sqrt(b*b-4*a*c)/(2*a)
r = (-10 +/- sqrt(100+40))/(-2)
r1 = 5 - sqrt(35)
r2 = 5 + sqrt(35)
.... your mileage may vary.
BTW, what were you doing in sophmore year of high school? (No, I didn't consult any references, but I did check by back substitution. I left sophmore year of HS in 1966.)
Multiply both sides by -1. Move the C-term to the zero side by elimination. Take 1/2 of the the coefficient of the x-term, square it and add to both sides. Express the left side as a square. Take the square root of both sides. Isolate x on the left by moving the number to the right. The answer will have the form x = n + sqrt(m).
Or not.
Written that way,
a = 1
b = -10
c = -10
Now does it look easier to plug into the quadratic equation?
why wouldn’t you just factor it instead.
using the AC rule
THe quadratic formula is not the solution here. It is a nice check of your work, but it rarely yields whole number answers.
Which in HS mathematics, the answers are always whole numbers
Go to http://en.wikipedia.org/wiki/Quadratic_equation and figure it out from .
PS: X has two answers.
Studying biology. Human reproductive biology. Twyla Sue was her name, I believe.
I learned math to be able to test for my first radio licence at the age of 11. (back in the days when you had to go to a federal center to test)
;)
/johnny
sorry, didn’t know you were serious : /
Since 35 is 6x6-1 then and the sqrt of -1 is i.
Then the answer is 5 plus divided by minus 6 i.
Plus divided by minus is minus.
Thus the answer is 5 minus 6 i, or 5 mnus 6.
Or rearranging terms according to the demonstrative rule: 5 sum’n 6. In otherwords: 10 maybe.
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