3x + 1)(3x - 4)
9x(x2+3x-10) * * * * * 9x3 + 27x2 - 90x = 9x(x2 + 3x - 10) = 9x(x + 5)(x - 2).
7
2 x 2 x 3 x 2 x 2 x 7 x 2 x 2 x 2 = 27 x 3 x 7 or 2688
Two possibilities here. 9x - 30x +25 = -21x + 25 and done, but I don't think you mean that. 9x² - 30x + 25 is more likely. This is easier than normal, since this follows the square pattern. (ax-b)² = a²x²-2ab+b² a² = 9 so a=3 b² = 25 so b=5 3*5*2 = 30, so it checks. (3x-5)(3x-5) = 9x² -15x - 15x + 25 = 9x² -30x + 25 ■
-9(x + 8)
9x2 + 9x - 10 =(3x - 2)(3x + 5)
is 9x^2 + 4 prime factor
-9x 2 -12x+5 =
(9x - 10)(x + 3)
9x2 + 8x - 1 = (9x - 1)(x + 1)
9x2 - 28x + 20 = 9x2 - 18x - 10x + 20 = 9x(x - 2) - 10(x - 2) = (9x - 10)*(x - 2)
10
9x2+11x-14 = (9x-7)(x+2) when factored with the help of the quadratic equation formula.
9x2+2x-7 = (9x-7)(x+1) when factored
(9x2 + 7)(9x2 - 7) = 81x4 - 49
9x2 - 18x + 99(x2 - 2x + 1)==========
9x2 + 7x = 2 9x2 + 7x - 2 = 0 9x2 + 9x - 2x - 2 = 0 9x(x + 1) - 2(x + 1) = 0 (9x - 2)(x + 1) = 0 x ∈ {-1, 2/9}