Math, asked by salimchoudhary207, 5 months ago

(2x - 4y)² - 4 (2x - 4y)-21 factories

Answers

Answered by priyasrinithi1984

0

Answer:

LET, (2x-4y)=a

a^2-4a^2-21

a^2-7a+3a-21

a^2+3a-7a-21

a(a+3) -7(a+3)

(a+3) (a-7)

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