SOLUTION: 1. x^4-81 2. y^4-8y^2-48 3. 8a^3-b^3 4. 25x^2+30x+9 5. x^2+16 how to solve

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: 1. x^4-81 2. y^4-8y^2-48 3. 8a^3-b^3 4. 25x^2+30x+9 5. x^2+16 how to solve      Log On


   

Question 340348: 1. x^4-81 2. y^4-8y^2-48 3. 8a^3-b^3 4. 25x^2+30x+9 5. x^2+16 how to solve
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1. where i=sqrt%28-1%29
2. where i=sqrt%28-1%29
3.+8a%5E3-b%5E3=%282a-b%29%284a%5E2%2B2ab%2Bb%5E2%29
4.++25x%5E2%2B30x%2B9=%285x%2B3%29%5E2
5.x%5E2%2B16+=%28x%2B4i%29%28x-4i%29 where i=sqrt%28-1%29