Question

Factorise 4x² + yz - 4xy – zx​

Answer 1

Answer:

+ z2 – 4xy – 2yz + 4xz = (2x)2 + (–y)2 + (z)2 + 2(2x)(–y) + 2(–y)( z) + 2(2x)(z) Using (a + b + c)2 = a2 + b2 + c.