MATHEMATICS MIDDLE SCHOOL

What are the solutions of the equation x4 + 6x2 + 5 = 0? Use u substitution to solve.x = i and x = i 5

X=+ i and x i 5

x=+ -1 and x= + -5

x= -1 and x= + - 5

Answers

Answer 1
Answer:

The solutions of the equation are x=\pm i, x=\pm √(5)i

Explanation:

Given that the equation is x^(4)+6 x^(2)+5=0

We need to determine the solutions of the equation.

Let us substitute x^(2) =u and x^4=u^2

Thus, the equation becomes,

u^(2)+6 u+5=0

Factoring the equation, we get;

(u+1)(u+5)=0

      u=-1, u=-5

Substituting back x^(2) =u and solve for x.

First, we shall substituteu=-1

Thus, we get;

x^(2) =-1

x=√(-1)

x=\pm i

Similarly, substituting u=-5, we get;

x^(2) =-5

x=√(-5)

x=\pm √(5)i

Thus, the solutions of the equation are x=\pm i, x=\pm √(5)i

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Answers

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Subtract. –56 – (–27.07)

A.
–83.07

B.
–28.93

C.
28.93

D.
83.07

Answers

to solve -56 - (-27.07)  we have to remember that a negative sign in front of another negative sign  will change the sign to a positive and -(-27.07)=27.07
-56+27.07=- 28.93
YOUR CHOICE IS B
-56-(-27.07)
-56+27.07
-28.93


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Figure GHIJ is congruent to figure NOPQ. What pair of angles must be congruent?(PLEASE HELP)!!!

Answers

Angle G is congruent to N, H is congruent to O, I is congruent to P, and J is congruent to Q. The first, second, third, fourth... letters of the figures must be congruent (due to mathematical notation).

What is 80 divided by 10

Answers

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Explain why all integers are rational numbers, but not all rational numbers are integers

Answers

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range:

mode:

Answers

Answer:

range=5

mode=6

Step-by-step explanation:

range means the max - min

6-1 = 5

mode means the most frequent number

6

Answer:

Range: 5 Mode: 6

Step-by-step explanation:
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