[Factorisation of Quadratic Expressions by Special Product] 49a^2 + 28a + 4

[Factorisation of Quadratic Expressions by Special Product] x^2y - 22xy + 121y

[Factorisation of quadratic expressions] 2p^2 - 11pq + 5q^2

[Factorisation of Quadratic Expressions by Special Product] 45m^2 + 60mn + 20n^2

[Factorisation of quadratic expressions] -3x^2 - 11x + 4

[Factorisation of Quadratic Expressions by Special Product] s^2t^2 - 16st + 64

[Factorisation of quadratic expressions] (x - 3)^2 + 12x

[Factorisation of quadratic expressions] 8x^2 - xy - 7y^2

[Factorisation of Quadratic Expressions by Special Product] 72u^2 - 2v^2

[Factorisation of quadratic expressions] -4x^2 - 8x - 4

[Factorisation of quadratic expressions] x^2y^2 - 5xy - 14

[Factorisation of Quadratic Expressions by Grouping Terms] 3m-6n+36nt-18mt

[Factorisation of Quadratic Expressions by Grouping Terms] m(2p-q)-3n(2p-q)

[Factorisation of Quadratic Expressions by Grouping Terms] 21mx-7kx-2ky+6my (Method 2)

[Factorisation of Quadratic Expressions by Grouping Terms] au-5b+ab-5u

[Factorisation of Quadratic Expressions by Grouping Terms] 21mx-7kx-2ky+6my (Method 1)

[Factorisation of Quadratic Expressions by Grouping Terms] 35mx-7m+5nx-n

[Factorisation of Quadratic Expressions by Special Product] 49b^2 - 1

[Factorisation of Quadratic Expressions by Grouping Terms] 1+2r-k-2kr