where did the 5 and sq rt of .5312 come from? put in calc and see what you get.
7/8 x^2 -3/4x + 5/16 = 0 original question
5 (3 + or - 4i times sq rt of .5312 all over 7) calc answer...
PLEASE HELP ME!!!!
2007-10-14 12:07:57 · 2 answers · asked by elliemae 2 in Science & Mathematics ➔ Mathematics
i know the quad formula. my answer was 3 + or - 4i times the sq rt of 34 all over 7
i want to know how the calculator got the answer it got
2007-10-14 12:20:05 · update #1
someone, please!! i have to have the answer for class tomorrow morning!!!
2007-10-14 14:25:14 · update #2
Use quadratic formula:
x = [.75 +/- sqrt(.75^2 - 4(7/8)(5/16))]/(2*7/8)
x = [.75 +/- sqrt( -.53125)]/(7/4)
x = [4*.75 +/- 4isqrt(.53125)]/7
x = [3 +/- 4isqrt(.53125)]/7
I don't know where the 5 came from. It should not be there.
2007-10-14 12:26:03 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋
That was probably from the quadratic formula.
Here's a link:
http://media.nasaexplores.com/lessons/01-003/images/quadform.gif
2007-10-14 19:14:38 · answer #2 · answered by kingof1337 2 · 0⤊ 0⤋