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)

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) (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

RELATED QUESTIONS
Add and Subtract the following polymomials... (answered by user_dude2008)

add and subtact the following 1) (-7x^2+5xy-2y^2)+(3x^2-5xy-4y^2) 2)... (answered by stanbon)

2. (6r^3 - 8rs + 4s^2) - (-5r^3 + 3rs + s^2) (answered by checkley77)

Please check my answers Please check my work add,subtract,multiply or divide the... (answered by checkley77)

solve for y r/3-2/y=s/5 a. y=1/5r-3s b. y=30/5r-3s c.... (answered by richwmiller)

(5r-2)(6r-4) (answered by jim_thompson5910)

Subtract (5a^3-9b^2+3ab) From... (answered by algebrahouse.com,ewatrrr)

3. (7a^4 + 8ab + b^2) + (-5a^4 - 8ab - 4b^2) (answered by colliefan)

Factor 9b^3 -... (answered by checkley75)