PLEASE HELP ME MATH
posted by barb on .
I only have 1 hour to get this question answered. Thank you in advance. I need a quadratic equation in the variable x given the solutions:
-7 sqrt 7, and 7 sqrt 7
This needs to be in the standard form of ax^2+bx+c=0.
Can someone please help me with this???? I am so lost!!!!
For a quadratic equation with given zeroes z1 and z2, the equation is:
In the given case, z1=-7√7 and z2=7√7.
Expand and simplify the resulting expression on the left-hand-side, and equate coefficients of powers x², x and constant term to get the values of a, b and c.
I gave you response to a similar question, except that I forgot the variable x, which should have read:
x² -5√5x -30 = 0
I understand, although mathlab checked it wrong and gave me this problem. I SIMPOLY do not understand this when it comes to radicals. And furthermore mathlab has a habit of checking problems wrong when they are indeed right.I understand how to FOIL, I just do not know how to work the radicals, CAN YOU PLEASE HELP ME!!!! This is due in 1 hour. Thank you so much!!!
And you are paying for Mathlab?
Just follow MathMate instructions and set it as
(x - 7√7)(x+7√7) = 0
looks like the difference of squares pattern, so ...
x^2 - 343 = 0
try that as input