Question

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1.Simplify (2x + 5)^2 - (2x - 5)^2​

Answer 1

Answer:

40x

Step-by-step explanation:

(2x + 5)^2 - (2x - 5)^2​

= (2x+5+2x-5)(2x+5-2x+5)

= 4x*10

= 40x

Answer 2

Answer:

40x

Step-by-step explanation:

As , a²-b² = (a+b )(a-b) So,

= [ (2x+5) +( 2x - 5 ) ][ ( 2x+5 )-(2x-5) ]

= ( 4x) ( 10)

= 40x