SOLUTION: Please help :Simplify the following 1. 12y4x2y2+8y3 2. (x3+27)÷(x+3) 3. Subtract 3a2+4b3-5c from 3a + b3+5d 4.factorise 24x3y-30xy2+48x3y3z 5. Factorise 3a-2b+(3a+2b)(3a

Algebra ->  Average -> SOLUTION: Please help :Simplify the following 1. 12y4x2y2+8y3 2. (x3+27)÷(x+3) 3. Subtract 3a2+4b3-5c from 3a + b3+5d 4.factorise 24x3y-30xy2+48x3y3z 5. Factorise 3a-2b+(3a+2b)(3a      Log On


   

Question 1005420: Please help :Simplify the following
1. 12y4x2y2+8y3
2. (x3+27)÷(x+3)
3. Subtract 3a2+4b3-5c from 3a + b3+5d
4.factorise 24x3y-30xy2+48x3y3z
5. Factorise 3a-2b+(3a+2b)(3a-2b)

Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
1. 12y%5E4x%5E2y%5E2%2B8y%5E3 does not look right: if you have a y%5E4 before the x%5E2 , why would there be a y%5E2 after the x%5E2 ?
Is that what you were expected to "simplify"?
12y%5E4x%5E2y%5E2%2B8y%5E3=12x%5E2y%5E6%2B8y%5E3=4y%5E3%283x%5E2y%5E3%2B2%29
2. %28x%5E3%2B27%29%2F%28x%2B3%29=%28x%2B3%29%28x%5E2-3x%2B9%29%2F%28x%2B3%29=x%5E2-3x%2B9 for x%2B3%3C%3E0<-->x%3C%3E-3
3. Subtract 3a%5E2%2B4b%5E3-5c from 3a+%2B+b%5E3%2B5d+

4. 24x%5E3y-30xy%5E2%2B48x%5E3y%5E3z=6xy%284x%5E2-5y%2B8x%5E2y%5E2z%29
5. 3a-2b%2B%283a%2B2b%29%283a-2b%29=%281%2B3a%2B2b%29%283a-2b%29