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Fofino [41]
3 years ago
13

Try This question out I’ll award you brainliest

Mathematics
2 answers:
xz_007 [3.2K]3 years ago
5 0

Answer:

0 and -1/4

Step-by-step explanation:

First you need to move the -9x to the left-hand side to set the problem to 0.so when you move it, it becomes a positive

36x^2 + 9x = 0

Now factor out the GCF

9x (4x + 1) = 0

Now set up two problems to solve:

9x = 0      divide by 9

x= 0

4x +1 = 0  subtract 1 from both sides

4x = -1  divide by 4

x = -1/4

NARA [144]3 years ago
3 0
The answer in the top right. x = 0 or -1/4

1. Obviously 0 is correct, as anything times 0 will always be 0.

2.
36(-.25)^ = 2.25
9(-.25) = 2.25
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Five times the sum of a number and 3 is the same as 3 multiplied by 1 less than twice the number ​
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Answer:-2

Step-by-step explanation:

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7 0
3 years ago
Please HELP!!!!
Karolina [17]

Answer:


Step-by-step explanation:

Firstly, note that -2i really is just z = 0 + (-2)i, so we see that Re(z) = 0 and Im(z) = -2.

When we're going from Cartesian to polar coordinates, we need to be aware of a few things! With Cartesian coordinates, we are dealing explicitly with x = blah and y = blah. With polar coordinates, we are looking at the same plane but with angle and magnitude in consideration.

Graphing z = -2i on the Argand diagram will look like a segment of the y axis. So we ask ourselves "What angle does this make with the positive x axis? One answer you could ask yourself is -90°! But at the same time, it's 270°! Why do you think this is the case?

What about the magnitude? How far is "-2i" stretched from the typical "i". And the answer is -2! Well... really it gets stretched by a factor of 2 but in the negative direction!

Putting all of this together gives us:

z = |mag|*(cos(angle) + isin(angle))

= 2*cos(270°) + isin(270°)).

To verify, let's consider what cos(270°) and sin(270°) are.

If you graph cos(x) and look at 270°, you get 0.

If you graph sin(x) and look at 270°, you get -1.

So 2*(cos(270°) + isin(270°)) = 2(0 + -1*i) = -2i as expected.

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