Could someone please help me with these general factoring questions? " ^ " denotes an exponenet!
8x^2y-4xy-4x
36x^5y^5 - 12x^4y^3 + 6x^3y^4
x^2 + 2x -3
3x^2 - 27
6y^2 - 7y -20
y^2 + 25
5n^3 + 20n^2 + 15n
98x^2 -56x +8
y^6 + 27
3x + 81x^4
2006-12-21 05:18:30 · 4 answers · asked by Brad C 1 in Science & Mathematics ➔ Mathematics
**Every line is a new question**
2006-12-21 05:34:27 · update #1
put ()() between ur questions!! Because the questions r not clear!
2006-12-21 05:30:05 · answer #1 · answered by smart-crazy 4 · 0⤊ 0⤋
1. 4x(2xy - y -1)
2. 6x^3y^3(6x^2y^2 - 2x + y)
3. (x + 3)(x - 1)
4. 3(x + 3)(x - 3)
5.(3y + 4)(2y - 5)
6. prime; if you're doing complex numbers, you could factor it into (y + 5i)(y - 5i)
7. 5n(n + 1)(n + 3)
8.2(7x-2)^2
9. (y^2 + 3)(y^4 - 3y^2 +9)
10. 3x(3x +1)(9x^2 - 3x + 1)
2006-12-21 05:45:44 · answer #2 · answered by Marcella S 5 · 0⤊ 0⤋
3x^2 - 27
= 3(x^2-9)
= 3(x-3)(x+3)
6y^2 - 7y -20
= 6y^2-15y+8y-20
= 3y(2y-5)+4(2y-5)
= (3y+4)(2y-5)
x^2 + 2x -3
= x^2-x+3x-3
= x(x-1)+3(x-1)
= (X+3)(x-1)
y^2 + 25
= y^2-(-25)
= [y-(-25)^.5][y+(-25)^.5]
= [y-5i][y+5i]
where i=(-1)^0.5
2006-12-21 05:39:18 · answer #3 · answered by bh 2 · 0⤊ 0⤋
I only do th4 last one
3x(1+27x^3)
sone of yours quesytions can not be factored ( that is not in R )
Y^2 + 25 = (y-5i)(y+5i) ( in C )
2006-12-21 05:39:54 · answer #4 · answered by gjmb1960 7 · 0⤊ 0⤋