Question

find factorisisation of 2-13a-13b+6(a+b)2

Answer 1

Put :

$x = (a + b)$

Factorization reduces to :

$6 {x}^{2} - 13x + 2$

$(6x - 1)(x - 2)$

Put the values back :
$(6a + 6b - 1)(a + b - 2)$