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We can multiply the polynomials $\left(x-\frac{2}{5}\right)\left(x+\frac{2}{5}\right)$ by using the FOIL method. The acronym F O I L stands for multiplying the terms in each bracket in the following order: First by First ($F\times F$), Outer by Outer ($O\times O$), Inner by Inner ($I\times I$), Last by Last ($L\times L$)
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$\begin{matrix}(F\times F)\:=\:(x)(x)\\(O\times O)\:=\:(x)(\frac{2}{5})\\(I\times I)\:=\:(-\fracx{5})(x)\\(L\times L)\:=\:(-\fracx{5})(\frac{2}{5})\end{matrix}$
Learn how to solve problems step by step online. Solve the product (x-2/5)(x+2/5). We can multiply the polynomials \left(x-\frac{2}{5}\right)\left(x+\frac{2}{5}\right) by using the FOIL method. The acronym F O I L stands for multiplying the terms in each bracket in the following order: First by First (F\times F), Outer by Outer (O\times O), Inner by Inner (I\times I), Last by Last (L\times L). Then, combine the four terms in a sum. Substitute the values of the products. Multiply -0.4 times 0.4.