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JAMB 1986 · UME · Q20

Factorize x2+2a+ax+2xx^2 + 2a + ax + 2x.

Worked solution (try it first)
  1. Reorder so the pairs share a factor: x2+2x+ax+2ax^2 + 2x + ax + 2a.
  2. Take out the common factors: x(x+2)+a(x+2)x(x + 2) + a(x + 2).
  3. Take out the common bracket: (x+2)(x+a)(x + 2)(x + a), option D.

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