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Popular >

simplify (5+5i)(-3-7i)

Solution

simplify

(5 + 5 i) (- 3 - 7 i)

Solution

20 - 50 i

Solution steps

(5 + 5 i) (- 3 - 7 i)

Apply complex arithmetic rule:

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

= (5 (- 3) - 5 (- 7)) + (5 (- 7) + 5 (- 3)) i

Simplify

(5 (- 3) - 5 (- 7)) + (5 (- 7) + 5 (- 3)) i : 20 - 50 i

= 20 - 50 i

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Frequently Asked Questions (FAQ)

What is (5+5i)(-3-7i) ?
The solution to (5+5i)(-3-7i) is 20-50i