6x^2 -13x+6 = (3x-2)(2x-3) when factorized
It is x^2 -13x +12 = (x-1)(x-12) when factored
-6 = 3 x -2 13 = 5 x 3 - 2 → 5x² + 13x - 6 = (5x - 2)(x + 3)
5x2 + 3x + 8x2 = 13x2 + 3x = x(13x + 3)
7 + 13x = -9 ie 13x = -9 - 7 x = -16/13 or "Minus one and three thirteenths"
13X squared + 7X + 12
It is (x+6)(x+7) when factored
6x^2 -13x+6 = (3x-2)(2x-3) when factorized
It is x^2 -13x +12 = (x-1)(x-12) when factored
-6 = 3 x -2 13 = 5 x 3 - 2 → 5x² + 13x - 6 = (5x - 2)(x + 3)
5x2 + 3x + 8x2 = 13x2 + 3x = x(13x + 3)
(x-4)
It's a quadratic expression: x²+13x+12 If, for example, x²+13x+12 = 0 then there are 2 roots, x=-1 and x=-12
7 + 13x = -9 ie 13x = -9 - 7 x = -16/13 or "Minus one and three thirteenths"
42 + x2 = 13x ∴ x2 - 13x + 42 = 0 ∴ (x - 6)(x - 7) = 0 ∴ x ∈ {6, 7}
(8x2)-(13x-16)= -78
x=-(29/11)