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25x + 35x + 9 is 60x + 9, which factors to 3(20x + 3)
x^2+25x-100 is not factorable because there are not numbers that when multiplied equal -100 and when added equal 25.
32 + x = 259 + x = 25x = 25 - 9x = 16
5x^2(x^2 + 5)
2x + 3 + 23x = 25x +3