4 years ago

Perform the indicated operation and write and standard form. -7i(6i-3)

2 answers:

7 0

-7i (6i - 3)

Perform the distributed multiplication to eliminate the parentheses:

-7i (6i) - 7i (-3) = -42i² + 21i

IF i = √-1 , then the expression is equal to (42 + 21i) or <u>21(2 + i) .</u>

Katena32 [7]4 years ago

4 0

$-7i(6i-3)=\\
-42\cdot(-1)+21i=\\
42+21i$

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