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MAXImum [283]
3 years ago
8

Determine weather the following is real or complex i^6-122-7i^2

Mathematics
1 answer:
Leona [35]3 years ago
7 0

Answer:

Real

Step-by-step explanation:

i^6-122-7i^2

(i^2)^3-122-7i^2

(-1)^3-122-7×(-1)

-1-122+7

-123+7

-116

So the final answer is -116

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Describe the nature of the roots for this equation
vitfil [10]

First, fint the roots of the equation 2x^2+5x-7=0.

1.

D=5^2-4\cdot 2\cdot (-7)=25+56=81,\\\sqrt{D}=\sqrt{81}=9,\\ \\x_1=\dfrac{-5-9}{2\cdot 2}=-\dfrac{14}{4}=-3.5,\\ \\x_2=\dfrac{-5+9}{2\cdot 2}=\dfrac{4}{4}=1.

2. You can see that this equation has two different real roots. Note that you can make this statement without finding roots, only knowing the value of discriminant: since D=81>0, then the equation has two different real roots.

5 0
3 years ago
Identify the parent function for g from its function rule. Then graph g on your calculator and describe what transformation of t
ira [324]
The parent function is f(x)=x^2.

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4 0
3 years ago
Apples lose 75% of their weight during drying. How many pounds of fresh apples do you need to pick in order to get 150 lb of dri
Anna35 [415]
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7 0
3 years ago
What is the equation of this line? <br>y=2×-3<br>y=-1/2×-3<br>y=-2×-3<br>y=1/2×-3​
Bad White [126]

Answer:

First option, y = 2x - 3

Step-by-step explanation:

Remember the formula for a line is y=mx+b, where m is slope (slope = rise/run) and b is y-intercept (y-intercept is the point that crosses the y-axis)

Since the line on the graph crosses the y-axis at -3, that will be the y-intercept. Starting from that point, find another point. In this case you go upwards 2 units and to the right 1, so your slope will be 2/1 or just 2 .

Hope this helped :)

5 0
2 years ago
PLZ help solve !!!!!!!
Ivahew [28]
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