Question

factorise 1-25(a+b)^2​

Answer 1

Answer:

Step-by-step explanation:

1 – 25(a + b)2

= (1)2 – [5(a + b)]2

= [1 + 5(a + b)] [1 – 5(a + b)]

= (1 + 5a + 5b) (1 – 5a – 5b)

Answer 2

Answer:

( 1 - 5a - 5b } * { 1 + 5a + 5b }

Step-by-step explanation:

your question : 1 - 25( a + b )²

first step :

1² - { 5(a + b) }² __________ Taking squares common

second step :

( 1 - 5(a + b) } * { 1 + 5(a + b) } _ Using identity a² - b² = ( a - b ) ( a + b )

third step :

( 1 - 5a - 5b } * { 1 + 5a + 5b } _ opening brackets...

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