Answer
4$x^{2}$+12x+9
Work Step by Step
Given$(2x+3)^{2}$
Use the formula: $(a+b)^{2}$=$a^{2}$+2ab+$b^{2}$
Plug in values: $(2x)^{2}$+2(2x)(3)+$(3)^{2}$
Simplify: 4$x^{2}$+12x+9
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