7Improved Answer:8x2-18x+9 = (4x-3)(2x-3)
(x+9)^2 =x^2 + 9 X^2 + 18x + 81 = X^2 +9 18X + 72 = 0 18X = -72 X =- 4
4x2 - 36x + 81 = 4x2 - 18x - 18x +81 = 2x(2x - 9) - 9(2x - 9) = (2x - 9)2
The GCF is 9.The GCF is 9.
The GCF is 9.
3x**4+18x 3x(x**3+6)
18x + 45 or 9(2x + 5) how is this answer figured?
5x2-18x+9 = (5x-3)(x-3)
7Improved Answer:8x2-18x+9 = (4x-3)(2x-3)
Because: (9-x)(9-x) = 81-18x+x^2
x2-18x+81 = (x-9)(x-9) when factored
(x+9)^2 =x^2 + 9 X^2 + 18x + 81 = X^2 +9 18X + 72 = 0 18X = -72 X =- 4
4x2 - 36x + 81 = 4x2 - 18x - 18x +81 = 2x(2x - 9) - 9(2x - 9) = (2x - 9)2
x² - 18x - 4 = o x² - 18x = 4 x² - 18x + (18/2)² = 4 + (18/2)² x² - 18x + 81 = 4 + 81 (x - 9)² = 85 x - 9 = ±√85 x = 9 ±√85 x = 9 + √85 or x = 9 - √85 if you are still confused, i want you to follow the related link that explains the concept of completing the square clearly.
9x2 - 18x + 99(x2 - 2x + 1)==========
Do you mean: factorise: 27x2-18x-18 best I can get is: 9((3x-2)-2)
5x² - 18x + 9 = (5x² - 15x) - (3x - 9) = 5x(x - 3) - 3(x - 3) = (5x - 3)(x - 3).