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It is: (x-5)(x-2)
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(5x - 2)(x - 5)
(x + 5)(x + 2)
x=13.5
2275.91 = 28xx = 81.2825
21x2 + 27x - 30 = 3*(7x2 + 9x - 10) = 3*(7x2 - 5x + 14x - 10) =3*[x*(7x - 5) + 2*(7x - 5)] = 3*(7x - 5)*(x + 2)