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TIMO - 2018 - Grade 8 - Preliminary Round - Paper 4 Question 7

TIMO · TIMO - 2018 - Grade 8 - Preliminary Round - Paper 4

Question 7

Factorize $x^4+y^4-3x^2y^2$.
  1. $(x^2-xy-y^2)(x^2+xy-y^2)$
  2. $(x^2-xy+y^2)(x^2+xy+y^2)$
  3. $(x^2+xy-y^2)(x^2+xy-y^2)$
  4. $(x^2-xy-y^2)(x^2-xy+y^2)$