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stira [4]
3 years ago
15

1) Simplify the expression

Mathematics
1 answer:
bazaltina [42]3 years ago
4 0

Answer:

21 + 12i

Step-by-step explanation:

Given

(3 - 4i)(1 + 5i) - (2 - i) expand the product of factors

= 3 + 11i - 20i² - 2 + i

= 3 + 11i + 20 - 2 + i  collect like terms

= 21 + 12i

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Step-by-step explanation:

Anna draws a angle that intercets at 1

3 0
2 years ago
What matrix multiplication is possible ?
gizmo_the_mogwai [7]

Answer:

Firstly, it is important to note that the multiplication of matrices is done in this way:

Columns x Rows or viceversa

Now, two matrices can be multiplied only if their dimensions are compatible, which means that the number of columns in the first matrix must be​​ equal to the number of rows in the second matrix.

In other words:

Two matrices A and B are said to be multiplies if the number of columns in A coincides with the number of rows in B.

In this context, the correct option is:

\left[\begin{array}{c}1&-1\end{array}\right] \left[\begin{array}{cc}0&4\end{array}\right]

Where A is:

\left[\begin{array}{c}1&-1\end{array}\right]

And B is:

\left[\begin{array}{cc}0&4\end{array}\right]

As you can see, the number of columns in A coincides with the number of rows in B

8 0
3 years ago
What are the exact solutions of x2 - 3x - 5 = 0? x = the quantity of negative 3 plus or minus the square root of 29 all over 2 x
Vinil7 [7]
x^{2}-3x-5=0 \\  \\ \Delta=(-3)^{2}-4*1*(-5)=9+20=29 \\  \\  \sqrt{\Delta} = \sqrt{29}  \\  \\ x_{1}= \frac{3- \sqrt{29} }{2}  \\  \\ x_{2}= \frac{3+ \sqrt{29} }{2}

<em>\\\ Ben</em>
3 0
3 years ago
Read 2 more answers
the space station has an average orbit of 250 miles above the earth. how many pennies would it take to make a stack that high? p
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2 years ago
Which of the choices below follow an exponential pattem? Select all that apply,
emmasim [6.3K]

Answer:

theres nothing to answer

Step-by-step explanation:

8 0
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