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Fittazjonez ∙
x^2-19x+90
(x-9) (x-10)
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(x - 10)(x - 9)
the only perfect square factor of 90 is 9
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Factor as : (x+9)(x+10) using the first terms ( x terms) multiply to x2; the last terms multiply to 90; the sum of 9x + 10 x = 19x
The perfect square factor of 50 is 25 and the perfect square factor for 90 is 9. The perfect square factors for 50x90 25x9. Of course we also have the other factors of 2 and 2x5.
That doesn't factor neatly. Applying the quadratic formula, we find two real solutions: (61 plus or minus the square root of 4081) divided by 2. x = 62.441352507368876 x = -1.441352507368876
45n + 90 factors to 45(n + 2)
15 x 11
45+45+90
7 is not a factor of 90. It does not divide into 90 evenly.