How can we factorise the two problems given completely. :)
in Factors of a number by Level 1 User (160 points)

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  1. We need factors of 4 whose difference is 3: 4 and 1 fit. So factorise: (4x-1)(x+1).
  2. Take out the common factor 2: 2(x^3-125), then we can see that x=5 is a zero of the cubic, so (x-5) is a factor and x^3-125 can be divided by x-5 to find the other factor: x^2+5x+25. The solution is


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