# Algebra (new one since I put "match" (bad speller)

posted by .

I have a few match problems that I can't figure out.
1.solve: 3x+5=x√7 (that's a radical sign)
2.factor: (2k+3)2-(2x+3)(y-2)-20(y-2)2 (the "2" after (2k+3) ans (y-2) is suppose to be a square sign.

thanks if you can help, or even if you can't

For number 2:
First, FOIL out (2k+3)^2. You should get:
4k^2 + 12k + 9.
Then, FOIL out (2x+3)(y-2). You should get:
2xy - 4x + 3y - 6. You wanted to subtract the first part by the second:
4k^2 + 12k + 9 -(2xy - 4x + 3y - 6).
Distribute the negative:
4k^2 + 12k + 9 - 2xy + 4x - 3y + 6.
Combine like-terms:
4k^2 + 12k - 2xy + 4x - 3y + 15.
Before multiplying 20 by (y-2)^2, FOIL out the (y-2)^2. You should get:
y^2 - 4y + 4.
Now multiply by 20:
20y^2 - 80y + 80.
Now, take the equation from 6 lines up and subtract by this part:
4k^2 + 12k - 2xy + 4x - 3y + 15 -(20y^2 - 80y + 80).
Distribute the negative:
4k^2 + 12k - 2xy + 4x - 3y + 15 - 20y^2 + 80y - 80.
Now, combine like-terms to finish:
4k^2 + 12k - 2xy + 4x + 77y - 20y^2 - 65.

## Similar Questions

1. ### Math(radicals or square roots)

i need a explanation for this equation: 5 radical(square root) 108 over 25 the 5 is in front of the square rooted number and it is a fraction PlEASE HELP :( That is not an equation. It is a number. It sounds like you are describing …

I have a few match problems that I can't figure out. 1.solve: 3x+5=x√7 (that's a radical sign) 2.factor: (2k+3)2-(2x+3)(y-2)-20(y-2)2 (the "2" after (2k+3) ans (y-2) is suppose to be a square sign. thanks if you can help, or …
3. ### Math(I Don't Get THIS!!)

15sqrt8x^16/5sqrt2x^4 *I totally need help with this one!Please help me.! I'm going to assume your problem is this: 15√(8x^16) / 5√(2x^4) You can start by simplifying what's outside the square root sign. 15/5 reduces to …
4. ### 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 …
5. ### Math integral

What is the integral of 1/(x√(x^2-4)) dx?
6. ### algebra 1

alright i have a few questions if its ok..?
7. ### Alg 1

Solve the proportion: 4/x = (radical sign over 11, not -1) 11 - 1/3 Please solve and explain. My answer does not match any of my choices.
8. ### Math

Could someone please help me solve this radical equation of 2x+7-2=x It's suppose to have the radical sign but I don't know how to put it on here. Thank you
9. ### Algebra

1.Simplify the radical expression. √5+6√√5 A.5√5 B.7√10 C.7√5 D.5√10 2.Simplify the radical expression. 2√6+3√96 A.14√6 B.14√96 C.5√96 D.50√6 3.Simplify …
10. ### Algebra - Check My Work

For Question 1-8 Simplify the Radical Expression *** - My Answer 1.√45 3√5*** 2.√180x^2 6x√5*** 3.√150x^3 k^4 5xk^2√6x*** 4.√21y * 5√49y 35y√21*** 5.(The square root sign applies …

More Similar Questions