Question

Factorisation of 25 (x + y)2 – 36 (x-2y)? is equal to​

Answer 1

Answer:

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Step-by-step explanation:

25(x+2y)

2

−36(2x−5y)

2

⇒25(x

2

+4xy+4y

2

−36(4x

2

−20xy+25y

2

)

⇒25x

2

+100xy+100y

2

−144x

2

+720y−900y

2

⇒−119x

2

+820xy−800y

2

⇒−119x

2

+680xy+140xy−800y

2

⇒−17x(7x−40y)+20y(7x−40y)

⇒(17x−20y)(40y−7x)