Algebra
Calculus
Trigonometry
Matrix
Question
Simplify the expression
−18j
Evaluate
9(−2i4j)
Rewrite the expression
9(−2)i4j
Evaluate the power
More Steps
Evaluate
i4
Calculate
i2×i2
Calculate
(−1)(−1)
Calculate
1
9(−2)×1×j
Rewrite the expression
9(−2)j
Rewrite the expression
−9×2j
Solution
−18j
Show Solution
Find the roots
j=0
Evaluate
9(−2i4j)
To find the roots of the expression,set the expression equal to 0
9(−2i4j)=0
Evaluate the power
More Steps
Evaluate
i4
Calculate
i2×i2
Calculate
(−1)(−1)
Calculate
1
9(−2×1×j)=0
Multiply the terms
9(−2j)=0
Multiply the numbers
More Steps
Evaluate
9(−2)
Multiplying or dividing an odd number of negative terms equals a negative
−9×2
Multiply the numbers
−18
−18j=0
Change the signs on both sides of the equation
18j=0
Solution
j=0
Show Solution