Saturday
February 28, 2015

Homework Help: Algebra 2

Posted by Jon on Tuesday, May 20, 2008 at 1:02pm.

1)Find the exact solutions of the system of equations x^2 + 2y^2 = 18 and x = 2y.

x=2y
x^2+2y^2=18
(2y)^2+2y^2=18
4y^2+2y^2=18
6y^2=18
y^2=3
y=+-3

x=2(+-3)
x=+-23

(+-2sqrt3,+-sqrt3)

2)Simplify, (d/(d^2-9)) + (5/(2d+6))

[d / (d^2 - 9)] + [5 / (2d + 6)]
= [d / (d - 3) (d +3)] + [5 / 2 (d + 3)]
= [2d + (5 {d - 3})] / [2 (d + 3) (d - 3)]
= [2d + 5d - 15] / [2 (d + 3) (d - 3)]
= (7d - 15) / [2 (d + 3) (d - 3)]
= (7d - 15) / (2d^2 - 18)

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

to bobpursley,math,correction - (sqrt3 + 5)(sqrt3 -3) ? multiply that out sqrt3*...
Algebra - Find the exact solution(s) of the system: x^2/4-y^2=1 and x=y^2+1 A)(4...
Algebra 2 - 1. Simplify: sqrt6(sqrt2/2+sqrt3)-sqrt8 2. Simplify: sqrt(72x^3)-5x ...
Math - Find the exact solution(s) of the system: x^2/4-y^2=1 and x=y^2+1 A)(4,...
algebra - 1)What is the 4x^2=y^2+8y+32 answer= either hyperbola or parabola 2)...
trigonometry - Using exact values,find the value of: (A=30degrees) sin 2A + tan ...
Algebra 1 - if i solve this problem vertically; (1+ sqrt3)*(1+ sqrt3) do i get 5...
pre calc - find all solutions on 0 is greater than or equal to theta < 2pi ...
math - find all solutions on 0 is greater than or equal to theta < 2pi cos ...
math, algebra,correction - I don't know if this is right. directions: Simplify ...

Members