Tutorial

Topic : Identities

Simply (3x+4)(3x-4) by using the identity (a+b)(a-b)=a²-b²

Step 1 : (3x+4)(3x-4) (Given Question Here a = 3x, b =5)

Step 2 : (3x+4)(3x-4)=(3x)²–(4)² Compare and Substitute in the given formula or identity)

Step 3 : 9x² - 16 (Here the first term becomes (3x)x(3x) = 9x, the second and last term becomes 4x4 =16).

Step 4 : Therefore 9x²-16 is the answer.

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