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JAMB 1985 · UME · Q19

Factorize abx2+8y−4bx−2axyabx^2 + 8y - 4bx - 2axy.

Worked solution (try it first)
  1. Group the terms that share bb and those that share yy: (abx2−4bx)+(8y−2axy)(abx^2 - 4bx) + (8y - 2axy).
  2. Take out the common factors: bx(ax−4)−2y(ax−4)bx(ax - 4) - 2y(ax - 4).
  3. Take out the common bracket: (ax−4)(bx−2y)(ax - 4)(bx - 2y), option A.

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