Question
Simplify the expression
Solution
−141−3i
Evaluate
(−9−6i)(11−7i)
Apply the distributive property
−9×11−9(−7i)−6i×11−6i(−7i)
Multiply the numbers
−99−9(−7i)−6i×11−6i(−7i)
Multiply the numbers
−99+63i−6i×11−6i(−7i)
Multiply the numbers
−99+63i−66i−6i(−7i)
Multiply the numbers
More Steps
Evaluate
−6i(−7i)
Multiply
−6(−7)i2
Multiply
42i2
Use i2=−1 to transform the expression
42(−1)
Calculate
−42
−99+63i−66i−42
Calculate
−141+63i−66i
Solution
More Steps
Evaluate
63i−66i
Collect like terms by calculating the sum or difference of their coefficients
(21−22)×3i
Calculate
−3i
−141−3i
Show Solution