Given 2x²=-8, x is DONE ✔

1 answer:

4 0

$2x {}^{2} = - 8 \\ x {}^{2} = \frac{ - 8}{2} \\ x {}^{2} = - 4 \\ x = ± \sqrt{ - 4} \\ x_{1} = 2i \: \: \: \: \: \: x_{2} = - 2i$

You might be interested in

Find 5x − 3y − z if x = −2, y = 2, and z = −3 −19 19 13 −13

Blababa [14]

5x - 3y - z
By hypothesis, x = -2, y = 2 and z = -3.

So you all need to do is replace each letter by its value and do the calculus:

5x - 3y - z = 5*(-2) - 3(2) - (-3)
= -10 - 6 + 3=
=-16 + 3
= -13

So when x = -2, y = 2 and z = -3
5x - 3y - z = -13 (answer d)

Hope this helps! :)

8 0

3 years ago

Justin is pouring a concrete walkway around his grandmother's rectangular garden. He wants the walkway to be 3 feet wide all the

sattari [20]

Answer: The area of the top of the walkway is 1,050 square feet

Step-by-step explanation:

Hi, to answer this question we simply have to apply the next formula:

Area of a rectangle: width x length (of the base)

Replacing with the values given and solving for A:

A = 25 feet x 42 feet = 1,050 square feet

In conclusion, the area of the top of the walkway is 1,050 square feet

Feel free to ask for more if needed or if you did not understand something.

8 0

3 years ago

Drag the tiles to the correct boxes to complete the pairs, In the figure, lines H and KL are parallel. TH K E G D Match each ang

xz_007 [3.2K]

The angle relationship and their reasons are:

m∠HED = m∠FEJ ---> Vertical angles theorem

m∠KFE = m∠DEH ---> Alternate interior angles theorem

m∠LFG = m∠DEH ---> Alternate exterior angles theorem

m∠JEF + m∠LFE = 180° ---> same-side interior angles theorem

m∠DEJ = m∠EFL ---> Corresponding interior angles theorem

m∠LFG + m∠GFK = 180 ---> linear pair

The angle pairs are formed based on their relative positions. The following shows each angle relationship and their reasons:

∠HED and ∠FEJ are directly vertically opposite each other, therefore, they are equal based on the vertical angles theorem.

m∠HED = m∠FEJ ---> Vertical angles theorem

∠KFE and ∠FEJ are alternate interior angles, therefore, they are equal based on the alternate interior angles theorem.

m∠KFE = m∠DEH ---> Alternate interior angles theorem

∠LFG and ∠FEJ are alternate exterior angles, therefore, they are equal based on the alternate exterior angles theorem.

m∠LFG = m∠DEH ---> Alternate exterior angles theorem

∠JEF and ∠LFE are interior angles on same side of the transversal, therefore, the sum of both angles equal 180 degrees based on the same-side interior angles theorem.