What is the area of a square if its side is (2x + 3)cm?
a. (2x² + 12x + 9)cm²
b. (2x² + 6x + 9)cm²
c. (4x² + 6x + 9)cm²
d. (4x² + 12x + 9)cm²
Solution:
A = a² or s × s
A = (2x + 3)²
A = (2x)² + 2(2x)(3) + 3²
A = (4x² + 12x + 9)cm²
Final Answer: d. (4x² + 12x + 9)cm²
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