Factorise: ab(x2+1)+x(a2+b2)
ab(x2+1)+x(a2+b2)
= abx2+ab+a2x+b2x
= abx2+a2x+ab+b2x
= ax(bx+a)+b(bx+a)
= (bx+a)(ax+b)
Factorise by grouping method: