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Divide all the terms by 4:-
2n2-9n+10 = (2n-5)(n-2) when factored
(x + 5)(x + 8)
(x + 8)(x - 5)
(x2 plus 40) (x minus 1)
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 - 4
(x + 10)(x + 4)