Question

What's the answer for (2+i)(i+2i)?​

Answer 1

`\boxed{ \bold{ \huge{ \boxed{ \sf{3 {i}^(2) + 6i}}}}}`

Explanation:

`\sf{(2 + i)(i + 2i)}`

Use the distribute property to multiply each term of the first binomial by each term of the second binomial.

⇒
`\sf{2(i + 2i) + i(i + 2i)}`

⇒
`\sf{2i + 4i + {i}^(2) + 2 {i}^(2) }`

Collect like terms

⇒
`\sf{3 {i}^(2) + 6i}`

Hope I helped!

Best regards!