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Popular >

simplify (x+4i)(x-5i)+xi

Solution

simplify

(x + 4 i) (x - 5 i) + x i

Solution

x^{2} + 20

Solution steps

(x + 4 i) (x - 5 i) + x i

Simplify

(x + 4 i) (x - 5 i) : (x^{2} + 20) - x i

= (x^{2} + 20) - x i + x i

Apply rule:

(a) = a

(x^{2} + 20) = x^{2} + 20

= x^{2} + 20 - x i + x i

Add similar elements:

- x i + x i = 0

= x^{2} + 20

Popular Examples

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(x + \frac{11}{6})^{2} = \frac{3}{4}

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Frequently Asked Questions (FAQ)

What is (x+4i)(x-5i)+xi ?
The solution to (x+4i)(x-5i)+xi is x^2+20