Question

factorise this
Q viii

Answer 1

${x}^{2} - {y }^{2} + 1 - {x}^{2} \times {y}^{2} \\ {x }^{2} - {x}^{2} + 1 - {y}^{2} \times {y}^{2} \\ 1 - y {}^{2} \times {y}^{2}$