What is expand (x+15-13i)(x+15+13i) ?

The solution to expand (x+15-13i)(x+15+13i) is x^2+30x+394

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expand (x+15-13i)(x+15+13i)

expand

(x + 15 - 13 i) (x + 15 + 13 i)

x^{2} + 30 x + 394

Solution steps

(x + 15 - 13 i) (x + 15 + 13 i)

Distribute parentheses

= xx + x \cdot 15 + x \cdot 13 i + 15 x + 15 \cdot 15 + 15 \cdot 13 i - 13 i x - 13 i 15 - 13 i 13 i

Simplify

xx + x \cdot 15 + x \cdot 13 i + 15 x + 15 \cdot 15 + 15 \cdot 13 i - 13 i x - 13 i 15 - 13 i 13 i : x^{2} + 30 x + 394

= x^{2} + 30 x + 394

(D - \frac{2}{25}) (D + \frac{2}{25})

(A + B^{^{'}}) (A + C)

3 (2 + 10)

(10 + 27) (7 + 10)

\frac{z + 19}{z ^{2} ( z - 1 )}

What is expand (x+15-13i)(x+15+13i) ?
The solution to expand (x+15-13i)(x+15+13i) is x^2+30x+394