Algebra

I need help

how do you solve these types of equations

3x2power-27=0

2t2power=100

-4y2power=36

please help me and tell me how you got it.

  1. 👍
  2. 👎
  3. 👁
  1. 3x2power-27=0
    3 x^2 = 27 divide both sides by 3
    x^2 = 9
    x = + or - sqrt (9)
    x = +3 or x=-3

    2t2power=100
    2 t^2 = 100
    t^2 = 50
    t^2 = 5*5*2
    t = + or - 5 sqrt (2)

    -4y2power=36
    y^2 = -9
    y = + or - 3 sqrt (-1)
    sqrt (-1) is usually called i or sometimes j
    so
    y = + or - 3 i

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. How do I do this.?(Math.)

    Use the Substitution method to solve the system of equations. y - 2x = -5 3y - x = 5 Solve one of the equations for x or y. Let's solve the first one for y: y - 2x = -5 y = 2x - 5 Now let's substitute 2x - 5 for y in the second

  2. Math

    Sustem of equations. I have to solve the system of equations by graphing and solving. Ther are thirty-three students in the Chess Club. There are five more boys than girls in the club. Write and solve a system of equations to find

  3. Algebra

    To solve the system of equations, which expression could be substituted for x into the first equation? 3x-5y=14 x+4y=10 a)10-4y b)4y+10 c)(1/4)x+(5/2) d)(-1/4)x+(5/2) I have another problem just like this one so if you could

  4. Algebra22222!!!

    Choose the ordered pair that is a solution to the system of equations. 3x - y = 10 -x + y = -4 (3, -7) (-1, 3) (3, -1) (3, 1) Follow the example I gave in your previous question. I'm not going to do all of them. You want to

  1. algebra

    solve the system of equations by graphing. Then classify the system as consistent or inconsistent and the equations as dependent or independent. x+y=14 x-y=2 What is the solution of the system of equations?

  2. math

    Solve the problem. A shirt company has 4 designs that can be made with short or long sleeves. There are 5 color patterns available. How many different types of shirts are available from this company? a. 9 types b. 40 types c. 11

  3. Mathematics

    2. Write an equation to represent the statement: "The product of a number and five plus two is equal to 100." (1 point) A. 5 - x - 2 = 100 B. 5(x - 2)=100 C. 5 x + 2 = 100 D. 5 - 2 x = 100 3. Solve using mental math. (1 point) 5 x

  4. SAT math

    1. x>15-2x / -3 Solve the linear inequality. Write the solution in set builder notation. So, -3x>15-2x, x

  1. Substitution Method

    Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 x + y = -4 x - y = 2 In the second equation, x= y+2 Putting that in the first.. (y+2) + y= -4 subtract two from each side, then divide each side by

  2. algebra

    iris plants to plant 3 different types of flowers in her garden, she has 5 different types of flower seeds to choose from. how many combinations of flowers are possible? I dont want the answer, I want to know how to solve it

  3. Algebra 2

    1.) Write a system of equations that has NO solution. 2.) If you wanted to eliminate the y variables in the system of equations below, what would you multiply the first and second equations by?( Do not solve the equation) 2x-3y=8

  4. algebra

    2a+3b-4c=7, a-b+2c=6 a) find an ordered triple of numbers (a,b,c) that satisfies both equations b) can you find a second ordered triple that satisfies both equations c) solve for b in terms of a, and solve for c in terms of a. how

You can view more similar questions or ask a new question.