x2 + 13x + 40 = x2 + 5x + 8x + 40 = x(x + 5) + 8(x + 5) = (x + 8)(x + 5)
8x = 32 so x = 4
13x
17x + 9
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
5x-13x+6=0 5x-13x=-6 -8x=-6 -8x/-8=-6/-8 x = 3/4
14
If you mean: 4x-6+5x = 13x-8 then it works out that x = 1/2 or 0.5
15x2-13x+2 = (5x-1)(3x-2) when factored
(5x - 4)(3x + 5)
18x + 18y - 4
5x^2 - 13x = x(5x - 13)
-6 = 3 x -2 13 = 5 x 3 - 2 → 5x² + 13x - 6 = (5x - 2)(x + 3)
13x - 9y - 10
(5x - 4)(3x + 5)
10x+7 = 5x+32 10x-5x = 32-7 5x = 25 x = 5
13x+27=3x+32 Reorder 13x-3x=32-27 Simplify 10x=5 Simplify x=5/10 Simplify x=1/2 Answer