2024 December(H31) Math Question 8
Algebraic & Function Expressions
- Simplify Algebraic Expressions
Recognize this as a difference of squares pattern: (a+b)(a−b)=a2−b2(a + b)(a - b) = a^2 - b^2(a+b)(a−b)=a2−b2.
Here a=3xa = 3xa=3x and b=2b = 2b=2:
(3x+2)(3x−2)=(3x)2−(2)2=9x2−4(3x + 2)(3x - 2) = (3x)^2 - (2)^2 = 9x^2 - 4(3x+2)(3x−2)=(3x)2−(2)2=9x2−4
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