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Popular >

simplify (3-i)^6

Solution

simplify

(3 - i)^{6}

Solution

- 352 - 936 i

Solution steps

(3 - i)^{6}

Apply binomial theorem:

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

a = 3, b = - i

= i = 0 \sum 6 (i 6) \cdot 3^{(6 - i)} (- i)^{i}

Expand summation

= \frac{6 !}{0 ! ( 6 - 0 ) !} \cdot 3^{6} (- i)^{0} + \frac{6 !}{1 ! ( 6 - 1 ) !} \cdot 3^{5} (- i)^{1} + \frac{6 !}{2 ! ( 6 - 2 ) !} \cdot 3^{4} (- i)^{2} + \frac{6 !}{3 ! ( 6 - 3 ) !} \cdot 3^{3} (- i)^{3} + \frac{6 !}{4 ! ( 6 - 4 ) !} \cdot 3^{2} (- i)^{4} + \frac{6 !}{5 ! ( 6 - 5 ) !} \cdot 3^{1} (- i)^{5} + \frac{6 !}{6 ! ( 6 - 6 ) !} \cdot 3^{0} (- i)^{6}

Simplify

\frac{6 !}{0 ! ( 6 - 0 ) !} \cdot 3^{6} (- i)^{0} : 729

Simplify

\frac{6 !}{1 ! ( 6 - 1 ) !} \cdot 3^{5} (- i)^{1} : - 1458 i

Simplify

\frac{6 !}{2 ! ( 6 - 2 ) !} \cdot 3^{4} (- i)^{2} : 1215 i^{2}

Simplify

\frac{6 !}{3 ! ( 6 - 3 ) !} \cdot 3^{3} (- i)^{3} : - 540 i^{3}

Simplify

\frac{6 !}{4 ! ( 6 - 4 ) !} \cdot 3^{2} (- i)^{4} : 135 i^{4}

Simplify

\frac{6 !}{5 ! ( 6 - 5 ) !} \cdot 3^{1} (- i)^{5} : - 18 i^{5}

Simplify

\frac{6 !}{6 ! ( 6 - 6 ) !} \cdot 3^{0} (- i)^{6} : i^{6}

= 729 - 1458 i + 1215 i^{2} - 540 i^{3} + 135 i^{4} - 18 i^{5} + i^{6}

Simplify

729 - 1458 i + 1215 i^{2} - 540 i^{3} + 135 i^{4} - 18 i^{5} + i^{6} : - 936 i - 352

= - 936 i - 352

Rewrite in standard complex form:

- 352 - 936 i

= - 352 - 936 i

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Frequently Asked Questions (FAQ)

What is (3-i)^6 ?
The solution to (3-i)^6 is -352-936i