2(4x - 3)(x + 3)
Because: (9-x)(9-x) = 81-18x+x^2
(X-9)2
Y = 3X^2 + 18X + 15 set to zero 3X^2 + 18X + 15 = 0 divide through by 3 X^2 + 6X + 5 = 0 now easy factor by inspection (X + 1)(X + 5) X = -1 X = -5 -1 checks by inspection and I assume -5 will check also
(a + x^2)(b + y^2)
2(4x - 3)(x + 3)
3x3+15x2+18x = 3x(x2+5x+6) = 3x(x+2)(x+3)
(x + 2)(3x - 1)(3x + 1)
Because: (9-x)(9-x) = 81-18x+x^2
6x2-18x+12 = (6x-6)(x-2)
2(x + 6)(x + 3)
(X-9)2
6x(3x2 - x + 4)
Y = 3X^2 + 18X + 15 set to zero 3X^2 + 18X + 15 = 0 divide through by 3 X^2 + 6X + 5 = 0 now easy factor by inspection (X + 1)(X + 5) X = -1 X = -5 -1 checks by inspection and I assume -5 will check also
(a + x^2)(b + y^2)
(a + 2 - b) (a + 2 + b)
No