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3 years ago

Solve the equation. X^2 + 22x = -40 The solutions to the equation are

Mathematics

1 answer:

elena-14-01-66 [18.8K]3 years ago

3 0

Answer:

$x_{1}=-2$

$x_{1}=-20$

Step-by-step explanation:

$x^2 + 22x = -40$

$x^2 + 22x+121 = -40+121$

Completing Square:

$(x+11)^2=81$

$x+11=\pm\sqrt{81}$

$x=-11\pm9$

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I neee help plss i have so lil time to hand it in

SashulF [63]

The Solution.

The given equation is

$\begin{gathered} y=|x|+7 \\ \text{Where x=11} \end{gathered}$

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1 year ago

Riko wants to find the distance between the points (−2, −3) and (2, −5). His work is shown. StartAbsoluteValue negative 3 EndAbs

swat32

Answer:

Riko is wrong because she uses the wrong formula.

Step-by-step explanation:

Given the coordinate points (-2, -3) and (2, -5)

We are to find the distance between the two points

Using the formula:

D = √(x2-x1)²+(y2-y1)²

From the coordinates x1 = -2, y1 = -3, x2 = 2 and y2 = -5

Substitute

D = √(2-(-2))²+(-5-(-3))²

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2 years ago

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