Math
posted by Melissa on .
Expand and simplify
1.(9a3)^2
2.(x^2+2x1)^2
3. 2(3a+4)(a6)(3a)^2+4(5a)

[3(3a1)]^2 = 9(9a^2  6a + 1) = 81a^2  54a + 9
don't know which you'd consider simpler
same with this one. expand it and get a 4th degree polynomial.
2(3a+4)(a6)  (3a)^2 + 4(5a)
= 2(3a^2  14a 24)  (9  6a + a^2) + 20  4a
= 6a^2  28a  48  9 + 6a  a^2 + 20  4a
= 5a^2  26a  37