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13x^{2}
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13x^{2}
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2^{2}x^{2}+\left(3x\right)^{2}
Expand \left(2x\right)^{2}.
4x^{2}+\left(3x\right)^{2}
Calculate 2 to the power of 2 and get 4.
4x^{2}+3^{2}x^{2}
Expand \left(3x\right)^{2}.
4x^{2}+9x^{2}
Calculate 3 to the power of 2 and get 9.
13x^{2}
Combine 4x^{2} and 9x^{2} to get 13x^{2}.
2^{2}x^{2}+\left(3x\right)^{2}
Expand \left(2x\right)^{2}.
4x^{2}+\left(3x\right)^{2}
Calculate 2 to the power of 2 and get 4.
4x^{2}+3^{2}x^{2}
Expand \left(3x\right)^{2}.
4x^{2}+9x^{2}
Calculate 3 to the power of 2 and get 9.
13x^{2}
Combine 4x^{2} and 9x^{2} to get 13x^{2}.
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