Question

please answer this immediately fast question (2x+5)²- (2x-5)²
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Answer 1

Answer:

let a = (2x +5) and b = (2x-5)

a² - b²

(a+b)(a-b)

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

(4x) (10)

40x..

Step-by-step explanation:

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Answer 2

Use binomial theorem :-

(a+b)²= a² + 2ab + b²

to expand (2x + 5 ) ²

4x² + 20x + 25 - (2x - 5) ²

4x² + 20x + 25 - (4x² - 20x + 25)

to find opposite of 4x² + 20x + 25,find the opposite of each term.

4x² + 20x + 25 - 4x² - 20x + 25

Combine 4x² and −4x² to get 0.

20x + 25 + 20x - 25

Combine 20x and 20x to get 40x.

40x + 25 - 25 = 40x.