Ab(a2+b2-c2)-bc(c2-a2-b2)+ca(a2+b2-c2) factorise this

[Dhanalakshmi]

ab(a²+b²-c²)-bc(c²-a²-b²)+ca(a²+b²-c²) factorise this

[Dhanalakshmi]

ab(a² + b² - c²) - bc (c² - a² - b²) + ca (a² + b² - c²)
= ab(a² + b² - c²) + bc (a² + b² - c²) + ca (a² + b² - c²)
= (a²+ b² - c²)(ab + bc + ca)