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Popular >

simplify (-4+9i)(-7-2i)

Solution

simplify

(- 4 + 9 i) (- 7 - 2 i)

Solution

46 - 55 i

Solution steps

(- 4 + 9 i) (- 7 - 2 i)

Apply complex arithmetic rule:

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

= (- 4 (- 7) - 9 (- 2)) + (- 4 (- 2) + 9 (- 7)) i

Simplify

(- 4 (- 7) - 9 (- 2)) + (- 4 (- 2) + 9 (- 7)) i : 46 - 55 i

= 46 - 55 i

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Frequently Asked Questions (FAQ)

What is (-4+9i)(-7-2i) ?
The solution to (-4+9i)(-7-2i) is 46-55i