Factor
\left(5x^{2}+4\right)^{2}
Evaluate
\left(5x^{2}+4\right)^{2}
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\left(5x^{2}+4\right)^{2}
Use the perfect square formula, a^{2}+2ab+b^{2}=\left(a+b\right)^{2}, where a=5x^{2} and b=4. Polynomial 5x^{2}+4 is not factored since it does not have any rational roots.
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