Tutorial

Topic : Identities

Simply (2x+5)² by using the identity (a+b)² = a² +2ab +b²

Step 1 : (2x + 5)² (Given Question, Here a = 2x, b = 5)

Step 2 : (2x + 5)² = (2x)²+2x2xx5+5² (Compare and Substitute in the given formula or identity)

Step 3 : 4x² + 20x + 25 (Here the first term becomes (2x)² = 2x x 2x = 4x², the next term becomes 2x2xx5=20x, the last term becomes 5²=5x5=25)

Step 4 : Therefore 4x²+20x+25 is the answer.

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