Mathematics: Simplify the expression. (–2 – 2i)(–4 + 6i) 8 – 4i 8 – 12i 20 – 4i –4 – 4i

Simplify the expression. (–2 – 2i)(–4 + 6i) 8 –

Abrahamolve

14.01.2022

Option 3rd is correct

20-4i

Step-by-step explanation:

Given the expression:

(-2-2i)(-4+6i)

Multiply the first term of the first expression to the second expression and second term of the first expression to the second expression

we have;

-2(-4+6i)-2i(-4+6i)

Using distributive property: $a \cdot (b+c) =a\cdot b + a\cdot c$

Also, we know: i^2 = -1

then;

8-12i+8i-12i^2

⇒ 8-12i+8i+12

Combine like terms;

⇒ 20-4i

Therefore, the simplified given expression is, 20-4i

0,0(0 оценок)

kmetz07

22.11.2021

Prime numbes

Step-by-step explanation:

Numbers whose only factors are 1 and itself are called prime numbers.

Such numbers have only two factors.

Examples are: 2, 3, 5, 7 ,9... etc.

0,0(0 оценок)