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Popular >

simplify (7-i)*(-8-5i)

Solution

simplify

(7 - i) \cdot (- 8 - 5 i)

Solution

- 61 - 27 i

Solution steps

(7 - i) (- 8 - 5 i)

Apply complex arithmetic rule:

(a + bi) (c + d i) = (a c - b d) + (a d + b c) i

= (7 (- 8) - (- 1) (- 5)) + (7 (- 5) - 1 \cdot (- 8)) i

Simplify

(7 (- 8) - (- 1) (- 5)) + (7 (- 5) - 1 \cdot (- 8)) i : - 61 - 27 i

= - 61 - 27 i

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Frequently Asked Questions (FAQ)

What is (7-i)*(-8-5i) ?
The solution to (7-i)*(-8-5i) is -61-27i