SOLUTION: I have three that I need help on. 1.(4x^2+2xy-3y^2)+(-2x^2+5xy-2^2) 2.(5r^3-6rs+3s^2)-(-5r^3-3rs+4s^2) 3.(3a^4+2ab+6b^2)+(-7a^4-8ab-9b^2)

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I have three that I need help on. 1.(4x^2+2xy-3y^2)+(-2x^2+5xy-2^2) 2.(5r^3-6rs+3s^2)-(-5r^3-3rs+4s^2) 3.(3a^4+2ab+6b^2)+(-7a^4-8ab-9b^2)       Log On


   

Question 209573: I have three that I need help on.
1.(4x^2+2xy-3y^2)+(-2x^2+5xy-2^2)
2.(5r^3-6rs+3s^2)-(-5r^3-3rs+4s^2)
3.(3a^4+2ab+6b^2)+(-7a^4-8ab-9b^2)
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
1.(4x^2+2xy-3y^2)+(-2x^2+5xy-2[?]^2) [are you missing a y^2 term here?]
2x^2+7xy-5y^2
2.(5r^3-6rs+3s^2)-(-5r^3-3rs+4s^2)
10r^3+9rs+7s^2
3.(3a^4+2ab+6b^2)+(-7a^4-8ab-9b^2)
-4a^4-6ab-3b^2