Question

Expand using standard identity.

(2x – 5)^2​

Answer 1

Step-by-step explanation:

(i) (2x + 5)2 Comparing (2x + 5)2 with (a + b)2 we have a = 2x and b = 5 a = 2x and b = 5, (a + b)2 = a2 + 2ab + b2 (2x + 5)2 = (2x)2 + 2(2x) (5) + 52  = 22 x2 + 20x + 25 = 22 x2 + 20x + 25 (2x + 5)2 = 4x2 + 20x + 25Read more on Sarthaks.com - https://www.sarthaks.com/1001030/expand-the-following-squares-using-suitable-identities-i-2x-5-2-ii-b-7-2-iii-mn-3p-2

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Answer 2

Answer:

(2x-5)^2

4x^2-25

2(2x)x-(5x5)