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Popular >

expand (2+sqrt(2))^4

Solution

expand

(2 + 2)^{4}

Solution

68 + 482

+1

Decimal

135.88225 \dots

Solution steps

(2 + 2)^{4}

Apply binomial theorem:

(a + b)^{n} = i = 0 \sum n (i n) a^{(n - i)} b^{i}

a = 2, b = 2

= i = 0 \sum 4 (i 4) \cdot 2^{(4 - i)} (2)^{i}

Expand summation

= \frac{4 !}{0 ! ( 4 - 0 ) !} \cdot 2^{4} (2)^{0} + \frac{4 !}{1 ! ( 4 - 1 ) !} \cdot 2^{3} (2)^{1} + \frac{4 !}{2 ! ( 4 - 2 ) !} \cdot 2^{2} (2)^{2} + \frac{4 !}{3 ! ( 4 - 3 ) !} \cdot 2^{1} (2)^{3} + \frac{4 !}{4 ! ( 4 - 4 ) !} \cdot 2^{0} (2)^{4}

Simplify

\frac{4 !}{0 ! ( 4 - 0 ) !} \cdot 2^{4} (2)^{0} : 16

Simplify

\frac{4 !}{1 ! ( 4 - 1 ) !} \cdot 2^{3} (2)^{1} : 322

Simplify

\frac{4 !}{2 ! ( 4 - 2 ) !} \cdot 2^{2} (2)^{2} : 48

Simplify

\frac{4 !}{3 ! ( 4 - 3 ) !} \cdot 2^{1} (2)^{3} : 162

Simplify

\frac{4 !}{4 ! ( 4 - 4 ) !} \cdot 2^{0} (2)^{4} : 4

= 16 + 322 + 48 + 162 + 4

16 + 322 + 48 + 162 + 4 = 68 + 482

= 68 + 482

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Frequently Asked Questions (FAQ)

What is expand (2+sqrt(2))^4 ?
The solution to expand (2+sqrt(2))^4 is 68+48sqrt(2)