Question

(2x-5)^2-(x+3)^2 explain full answer
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Answer 1

Answer:

step by step explanation

(2x-5)²-(x+3)²

4x²-25-x²+9

4x²-x²-25+9

3x²-16

Answer 2

Answer:  3x²- 26x + 16

Step-by-step explanation:

(2x- 5)² - (x + 3)²

(a +b)² = a² + 2ab + b²                  (a-b)² = a² - 2ab + b²

= (2x)² - (2 * 2x*5) + (5)² - { (x)² + (2*x*3) + (3)²}

= 4x² - 20x + 25 - ( x² + 6x + 9)

= 4x² - 20x + 25 -  x² - 6x - 9

= 3x²- 26x + 16

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