Question

i. (2x – 5y) (2x – 5y) with method​

Answer 1

❥Answer-

( identity : (a-b)² = a²-2ab +b²)

$= {(2x - 5y)}^{2}$

$= {(2x)}^{2} - 2(2x)(5y) + {(5y)}^{2}$

$= 4 {x}^{2} - 20xy + 25 {y}^{2}$

Answer 2

Answer:

Answer-

( identity : (a-b)² = a²-2ab +b²)

= {(2x - 5y)}^{2}=(2x−5y)

2

= {(2x)}^{2} - 2(2x)(5y) + {(5y)}^{2}=(2x)

2

−2(2x)(5y)+(5y)

2

= 4 {x}^{2} - 20xy + 25 {y}^{2}=4x

2

−20xy+25y

2