Question

Factorise: x^2-a^2+4ab-4b^2​

Answer 1

${x}^{2} - {a}^{2} + 4ab - 4 {b}^{2}$

${x}^{2} - ( {a}^{2} - 4ab + 4 {b}^{2} )$

${x}^{2} - ( {a - b})^{2}$

$(x - a + b)(x + a - b)$