2006-06-24 12:15:22 · 7 answers · asked by speedlump2 3 in Education & Reference ➔ Homework Help
Work it backwards.
2006-06-24 12:23:15 · answer #1 · answered by ? 5 · 3⤊ 1⤋
using a scientific calculator press mod degree and enter the values of 2, -3, -6 and it will give u the answer
without a calculator u should:
u should find x=b^2-4ac====> in this case x=-3^2-4*2*(-6)=-42
then y is equal to -b-root(x)/4ac===>3-root42/48
2006-06-24 19:40:03 · answer #2 · answered by Anonymous · 0⤊ 0⤋
2y^2-3y-6=0
Use Quadratic Equation
y= (-b +- sqrt(b^2 - 4ac)) / (2a)
y= (-(-3) +- sqrt((-3)^2 - 4(2)(-6))) / 2(2)
y= (3 +- sqrt(9 +48)) / 4
y= (3 +- sqrt(57)) /4
As the equation says + or -, there are two possible answers (y1 and y2).
y1= 2.6374586088176874
y2= -1.1374586088176874
2006-06-24 20:35:18 · answer #3 · answered by Mike B 3 · 1⤊ 0⤋
Use the quadratic equation...
Just put the values in the formula
y= -b +-root b^2-4ac/2a
here a=2 b=-3 and c=-6
Just put the values in place and ull get 2 values of y..one positive and one negative
2006-06-24 20:05:38 · answer #4 · answered by Desperate 1 · 0⤊ 0⤋
I'm not sure what ^ means exactly, so I can't tell you step-by-step.
You have zero on one side of equal sign, so your goal is to get the terms with the y's on one side , then continue to solve for y.
2006-06-24 23:26:16 · answer #5 · answered by Jolie 3 · 0⤊ 1⤋
the two solutions are:
(3(-+)sqrt(9+48))/4
approx. 2.63 and -1.37
2006-06-24 19:27:49 · answer #6 · answered by BotiN 1 · 0⤊ 0⤋
use the quadratic equation.
2006-06-24 19:22:22 · answer #7 · answered by Isles1015 4 · 0⤊ 1⤋