posted by .

Directions are simplify by combining like terms.

x radiacal 18 -3 radical 8x^2

can someone show me how to do these types of problems. thanks

I cant determine the second term. For the first, I think you meant

x sqrt(18) which reduces to
x sqrt (9*3) or
3x sqrt 3

First remove squares from under the radical sign
x sqrt(18) = x sqrt (9*2) = 3x sqrt 2
3 sqrt(8x^2) = 3 sqrt (4*2*x^2)
= 6x sqrt 2
Now combine terms.
x sqrt(18) - 3 sqrt(8x^2)
= sqrt 2*(3x - 6x) = -3x sqrt 2

You can get other possible answers by using the negative square roots. For example
x sqrt(18) = x sqrt (9*2)
= (+ or -) 3x sqrt 2

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    thanks for the answers, but I need to know how to solve the problems, so I can finish the remainder of my homework. Use a power of ten to change each to a decimal. 2 1/2 4 1/25 I need to learn how to solve these types of problems. …
  2. math, algebra,correction

    I don't know if this is right. directions: Simplify each radical expression. (radical 3+5)(radical 3-3) i think its: radical 3+2 Life would be so much simpler if you would use parenthesis. Did you mean this?
  3. math,correction,plz

    can someone correct these for me plz. Simplify by combining like terms. Problem#32 radical(63) minus 2radical(28) plus 5radical(7) My answer: 4radical(7) Find the perimeter of the triangle shown in the figure. leg...1 = radical (5) …
  4. math,correction

    Simplify by combining like terms. Problem #32 radical (63) - 2 radical (28) + 5 radical (7) My answer: 4radical(7) Problem #50 Find the perimeter of the triangle shown in the figure. leg 1 = radical (5) - radical (3) leg 2= radical …
  5. math,algebra

    I need help if someone can show me the steps to these 2 problems. Problem #1 Use the properties for radicals to simplify each of the following expressions. Assume that all variables represent positive real numbers. radical and inside …
  6. math,correction

    Problem #1 Simplify by combining like terms. xã(18) -3ã(8x^2) My answer: -3xã(2) Problem #2 Simplify each radical expression. (ã(3) + 5)(ã(3) - 3) My answer: -12 see my previous post, don't understand your symbol ã …
  7. math , help,algebra

    i am up to this point in my problem but i don't know what to do next with it can someone show me. Directions: Simplify by combining like terms x radical(18) minus 3radical(8x^2) these are the steps that i've done so far. = x radical …
  8. math,algebra II

    I have to work with these types of problems dealing with matrises can someone show me how to solve them.Heres one of them: Directions: Find the values of the variables in each equation in the first matrix it looks like this a+2 3z+1 …
  9. math

    Can someone show me the steps necessary to simplify the expression by combining like terms?
  10. Math (Pre-Algebra)

    How do you simplify this equation by combining like terms or using the distributive property?

More Similar Questions