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Popular >

simplify (9i)(-5i)

Solution

simplify

(9 i) (- 5 i)

Solution

45

Solution steps

(9 i) (- 5 i)

Apply rule:

a (- b) = - ab

(9 i) (- 5 i) = - 9 i 5 i

= - 9 i 5 i

Multiply the numbers:

- 9 \cdot 5 = - 45

= - 45 ii

Apply exponent rule:

aa = a^{2}

ii = i^{2}

= - 45 i^{2}

Apply imaginary number rule:

i^{2} = - 1

= - 45 (- 1)

Multiply the numbers:

- 45 (- 1) = 45

= 45

Popular Examples

simplify 70*7 simplify

70 \cdot 7

x/3+(x+2)/4-(x+3)/9 =3

\frac{x}{3} + \frac{x + 2}{4} - \frac{x + 3}{9} = 3

lo g_{3} (216) = x

((x+2))/4-((x-1))/3 =2

\frac{( x + 2 )}{4} - \frac{( x - 1 )}{3} = 2

3 + 2 x = 41

Frequently Asked Questions (FAQ)

What is (9i)(-5i) ?
The solution to (9i)(-5i) is 45