# math

posted by .

factor completely

81x^4 - 81

possible choices are::

(9x^2 + 9)(9x^2 - 9)

OR

(9x^2 +9)(3x + 3)(3x - 3)

• math -

No reason to stop there. Factor out all those 3's:

81(x^2+1)(x-1)(x+1)

If you must pick one of those choices, then use the last one, since it factors the 9x^2-9 as well. (factor completely!)

• math -

0968763228

## Similar Questions

1. ### math

factor this polynomial function completely f(x)=12x^4+10x^3-214x^2+198x+90 I found all the possible rational zeros but just cant seem to factor it all
2. ### factor completely

125c^3 + 729x^3 (5c)^3 + (9x)^3 (5c + 9x)(25c^2 - 45cx + 81x^2) Is this correct?
3. ### math

factor the expression 81x^2-54xy+9y^2 into product of binominials
4. ### Math

Find the real-number solution of the equation. 3x^7 = 81x^4 I got this far... 3x^7 - 81x^4 = 0 x^4 (3x^3 - 81) = 0
5. ### MATH

A student is solving the equation 81x – 1 = 3x + 2. Step 1: 81x – 1 = 3x + 2 Step 2: (34)x – 1 = 3x + 2 Step 3: 34x – 4 = 3x + 2 Which is the next step?
6. ### math

I need help with these two problems please. Completely factor the polynomial. 8x^3+16^2+8x+16 Factor the trinomial completely. y^3-14y^2+48y
7. ### algebra

factor y^2 + 18xy + 81x^2
8. ### Algebra 2

1.) The cost in C dollars of manufacturing x bicycles at Holliday's Production Plant is given by the function C(x) = 2x2 - 800x + 92,000. Find the minimum cost. 2.) The vertex of y = -3x2- 6x - 9 lies in which quadrant?
9. ### math help

Factor f(x) into linear factors given that k is a zero of f(x). f(x)=x^3+(12-4i)x^2+(32-48i)x-128i, k=4i In completely factored form, f(x) =____ (factor completely. simplify your answer)
10. ### Algebar

81x^(6)-25y^(10) Factor

More Similar Questions