Which of the following shows the polynomial-3a2 + 9a3 + 1 -a in standard form?
a 5a + 1
6 1-2-3a2 +9a
© 9a - 3a2 - a +1
@ 9a3 + 3a2 + 1 -a

9a^3 - 3a^2 - 1a + 1

Step-by-step explanation:

A polynomial in standard form has its terms arranged in decreasing order by power of x.  Given -3a2 + 9a3 + 1 -a, we rearrange the terms in decreasing order by power of x, obtaining:  

9a^3 - 3a^2 - 1a + 1

Notice that the powers of a are in decreasing ordeer:  {9, -3, -1, 1}

answer: 1) twenty-seven times y

              2) twenty-seven multiplied by y

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225