3 years ago

X^2 + 8x +19=0. Find a equivalent equation Solve by completing the square

Mathematics

1 answer:

Vaselesa [24]3 years ago

6 0

Answer:

theres no real answers

Step-by-step explanation:

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Tan^2x+sec^2x=1 for all values of x. <br> true or false?

amid [387]

This is not true.

$\tan^2x+\sec^2x=\dfrac{\sin^2x}{\cos^2x}+\dfrac1{\cos^2x}=\dfrac{1-\cos^2x+1}{\cos^2x}=2\sec^2x-1$

$2\sec^2x-1=1\implies\sec^2x=1\implies\sec x=\pm1\implies x=n\pi$

where is $n$ is any integer. So suppose we pick some value of $x$ other than these, say $x=\dfrac\pi4$ . Then

$\tan^2\dfrac\pi4+\sec^2\dfrac\pi4=1+2=3\neq1$

5 0

3 years ago

Read 2 more answers

You travel from city A to city B and back your trip last five and a half hours and you maintain a speed of 64 miles per hour the

malfutka [58]

Answer:

401 MILES

Step-by-step explanation:

miles from A to B:

64 * 5.5 = 352 miles

miles from A to C:

352 + 49 = 401 miles

3 0

3 years ago

Write an equivalent expression for 5+2+2x+2 <br>please help me

patriot [66]

Answer:

2x+9

Step-by-step explanation:

You have to combine like terms. 2x stays the same because there are no other like terms, but 5, 2, and 2 can be added together to make 9

8 0

2 years ago

Which of the following statements about the mean is false?

Harlamova29_29 [7]

Answer:

The value of the mean reflects both the number and the value of cases. is false

Step-by-step explanation:

8 0

3 years ago

suppose a triangle has two sides of length 32 and 35, and that the angle between these two sides is 120. what is the length of t

Vesnalui [34]

Using cosine rule, the length of the required side = sqrt(32^2 + 35^2 - 2 x 32 x 35cos 120)
= sqrt(1024 + 1225 - (-1120))
= sqrt(2249 + 1120)
= sqrt(3369)
= 58.04

4 0

3 years ago