3 years ago

How do I do this please help

Mathematics

1 answer:

nalin [4]3 years ago

5 0

Answer:

3x^2 + 12x - 15

Step-by-step explanation:

(x+5) * (x - 1) * 3

(x^2 + 5x - x - 5) * 3

(x^2 + 4x - 5) * 3

(3x^2 + 12x - 15)

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4 years ago

Simplify −2i sqrt −12<br><br> please help!

defon

$\bf \textit{recall that }i^2=-1\\\\
-------------------------------\\\\
-2i\sqrt{-12}\quad 
\begin{cases}
12=2\cdot 2\cdot 3\\
\qquad 2^2\cdot 3
\end{cases}\implies -2i\sqrt{-1\cdot 2^2\cdot 3}
\\\\\\
-2i\sqrt{-1}\cdot \sqrt{2^2}\cdot \sqrt{3}\implies -2i\cdot i\cdot 2\cdot \sqrt{3}\implies -4i^2\sqrt{3}
\\\\\\
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