Answer :

[tex](\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8}) = -22[/tex]

Solution:

Given that we have to multiply the given expression

Given is:

[tex](\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8})[/tex]

We have to multiply the above expression

Apply the difference of two squares formula

[tex](a+b)(a-b) = a^2-b^2[/tex]

Similarly for,

[tex](\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8})[/tex]

We have,

[tex]a = \sqrt{10}\\\\b = 2\sqrt{8}[/tex]

Thus the equation becomes,

[tex](\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8}) = (\sqrt{10})^2 - (2\sqrt{8})^2\\\\Simplify\\\\(\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8}) =(\sqrt{10} \times \sqrt{10}) - (2\sqrt{8} \times 2\sqrt{8})[/tex]

Use the below rule,

[tex]\sqrt{a} \times \sqrt{a} = a[/tex]

Therefore, the above equation becomes,

[tex](\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8}) =10 - 4 \times 8\\\\(\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8}) = 10 - 32\\\\(\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8}) =-22[/tex]

Thus upon multiplying the given expression, solution is -22

Answer:

-22

Step-by-step explanation:

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