Question

Factorise:
1. x² + z² – 2xz ​

Answer 1

x² + z² - 2xz

=> ( x - z )² { because , a² + b² - 2ab = ( a - b)² }

Answer 2

solution

(x-z)²

$(x - z) (x - z)$

$= x { }^{2} - xz - xz + z {}^{2}$

$= x {}^{2} + z {}^{2} - 2xz$

i hope it helps you!