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Popular >

expand (1-i)(2,-1)

Solution

expand

(1 - i) (2, - 1)

Solution

1 \cdot 2, - 1 \cdot 1 - 2 i, 1 i

Solution steps

(1 - i) (2, - 1)

Apply FOIL method:

(a + b) (c + d) = a c + a d + b c + b d

a = 1, b = - i, c = 2,, d = - 1

= 1 \cdot 2, 1 \cdot (- 1) + (- i) \cdot 2, (- i) (- 1)

Apply minus-plus rules

+ (- a) = - a, (- a) (- b) = ab

= 1 \cdot 2, - 1 \cdot 1 - 2 i, 1 i

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Frequently Asked Questions (FAQ)

What is expand (1-i)(2,-1) ?
The solution to expand (1-i)(2,-1) is 1*2,-1*1-2i,1i