Question

solve using suitable identity (5x-9)2​

Answer 1

Answer:

-45 2

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Answer 2

Answer :

• (5x - 9)² = 25x + 81 - 90x.

Given :

• (5x - 9)²

To find :

• Value of expression

Solution :

Given,

• (5x - 9)²

We know that,

• (a - b)² = a² + b² - 2ab

where ,

• a = 5x
• b = 9

⤍ (5x - 9)²

⤍ (a - b)² = a² + b² - 2ab

⤍ (5x - 9)² = (5x)² + (9)² - 2(5x)(9)

⤍(5x - 9)² = 25x + 81 - 2(45x)

⤍ (5x - 9)² = 25x + 81 - 90x

Hence,

• (5x - 9)² = 25x + 81 - 90x.