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Distribute and simplify these radicals:

[tex]\[ \sqrt{12} \cdot (-1 + \sqrt{5}) \][/tex]

A. [tex]\(-4 \sqrt{3}\)[/tex]

B. [tex]\(-2 \sqrt{3} + 2 \sqrt{15}\)[/tex]

C. [tex]\(4 \sqrt{3}\)[/tex]

D. [tex]\(6 \sqrt{3}\)[/tex]


Sagot :

Sure, let's go through each expression step-by-step and simplify these radicals.

1. Distribute and simplify: [tex]\(\sqrt{12} \cdot (-1 + \sqrt{5})\)[/tex]

[tex]\[ \sqrt{12} \cdot (-1 + \sqrt{5}) = \sqrt{12} \cdot (-1) + \sqrt{12} \cdot \sqrt{5} \][/tex]
Simplify each term:
- [tex]\(\sqrt{12} \cdot (-1) = -\sqrt{12}\)[/tex]
- [tex]\(\sqrt{12} \cdot \sqrt{5} = \sqrt{12 \cdot 5} = \sqrt{60}\)[/tex]

Combining these:
[tex]\[ -\sqrt{12} + \sqrt{60} \][/tex]

Numerically, this evaluates approximately to [tex]\(4.28186507727708\)[/tex].

2. Simplify: [tex]\(-4 \sqrt{3}\)[/tex]

This expression is already in its simplest form.

Numerically, this is approximately [tex]\(-6.928203230275509\)[/tex].

3. Simplify: [tex]\(-2 \sqrt{3} + 2 \sqrt{15}\)[/tex]

Each term is already simplified, so we present the expression as:

Numerically, this evaluates approximately to [tex]\(4.28186507727708\)[/tex].

4. Simplify: [tex]\(4 \sqrt{3}\)[/tex]

This expression is already in its simplest form.

Numerically, this is approximately [tex]\(6.928203230275509\)[/tex].

5. Simplify: [tex]\(6 \sqrt{3}\)[/tex]

This expression is already in its simplest form.

Numerically, this is approximately [tex]\(10.392304845413264\)[/tex].

These expressions, when simplified and calculated numerically, yield the values mentioned above.