This doesn't factor neatly. Applying the quadratic equation, we find two imaginary solutions: (-17 plus or minus the square root of -671) divided by 12
x = -1.4166 + 2.158638974498103i
x = -1.4166 - 2.158638974498103i
where i is the square root of negative one.
x2 + 3x - 40 = (x + 8)(x - 5)
(x + 8)(x - 5)
9x - 9 = 36 9x = 45 x = 5
1x40, 2x20, 4x10, 5x8 are all the factor pairs of 40.
The greatest common factor of 40 and 63 is 1.
(x2 plus 40) (x minus 1)
Dividing all terms by 4 gives: x2-6x+8 = (x-2)(x-4) when factored
5(x=8)
x2+14x+40 = (x+4)(x+10) when factored
4(n + 2)(2n + 5)
10(x+4)
No solution in integers.
x2 + 3x - 40 = (x + 8)(x - 5)
(x + 5)(x + 8)
X - 4
(x + 5)(x + 8)
(x + 10)(x + 4)