math 30
posted by Sandy .
I need to write 4x^2  y^2 8x 4y + 16 = 0 in standard form and I keep getting it wrong. Could someone please help me. Thanks

math 30 
bobpursley
4(x^22x+1) (y^2 +4y+4)=16
4(x1)^2(y+2)^2=(4)^2
(x1)^2/1 (y+2)^2/2^2=1
Now this negative sign presents a problem, so
(y+2)^2/4^2 (x1)^2/2=1
check that.
Respond to this Question
Similar Questions

Algebra
 ok... we keep getting this one wrong: Solve the following equation for x. Write your answer as a fraction in simplest form. 6(x5)=2x86(3x5) What is it you don't understand about this? 
Math
(7.66 • 10^2)(6.29 • 10^4) answer then convert to scientific notation. the answer I keep getting is 0.481814 the scientific notation I get from this is 4.81814*10^5 but i keep getting it wrong. Can someone please help me. 
Math
Write each equation in standard form. 1.y3=2.4(x5) The answer I got was 2.4x + y = 15. Could someone please check my answer and tell me how to solve it if it wrong? 
math
write an equation of the line containing the given point and parallel to the given line; use y=mx+b form; (5,8) x+4y=7 i keep getting this wrong. Can someone show me how to work this? 
Math!!!!
I am getting desperate. Can someone please help me with this and thank you in ADVANCE!!!! WRITE A QUADRATIC EQUATION IN THE variable x given the solutions: sqrt7, 7sqrt7.This needs to be in the standard form ax^2 + bx+c=0. I really … 
Math SOMEONE PLEASE PLEASE PLEASE PLEASE HELP
Find sin(θ), cos(θ), tan(θ). Assume a = 40, b = 9, and c = 41. (Do not use mixed numbers in your answers.) Okay for some reason I keep getting this problem wrong. For sin(θ) I put 9/41, but it's wrong. Could someone … 
Math
Perform the indicated operations and write in standard form. Sq root of 25(3 sq root of 81) Sorry, I don't know how to do the square root symbol. I keep getting 15i45i^2, which would be 45+15i in standard form, right? 
Math
Consider the following test scores obtained by a class. Test score 90 80 70 60 50 Frequency 1 4 11 6 2 Find the standard deviation (rounded to the nearest hundredth).  I've posted this question earlier … 
Algebra
I have an assignment to write an equation to pointslope form, then to standard form, and then to slopeintercept form. I have used the points (2,1) or (1,2), but I used (2,1). Now, I have the pointslope form of y + 1= 1(x + 2) … 
math
How do you solve this? 5x [1.5 3.6] [0.2 1.3] [0.3 2.8]= [5.6 1.7] 5x/5[1.5 3.6] [0.2 1.3] [0.3 2.8]=[5.6 1.7] x = [1.5 3.6] [0.2 1.3] [0.3 2.8]=[5.6 1.7] [1.5 + 0.2 + 3.6 + 1.3] [0.3 + 5.6 + 2.8 + 1.7] x = [1.3 4.9]