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3 years ago

X²-4=0 can you help me solve for x?

Mathematics

2 answers:

Nana76 [90]3 years ago

7 0

Answer:

x = 2 & - 2

Step-by-step explanation:

We have to find the value of x from the given equation.

x²-4=0 is a quadratic equation, so it will have two values.

Step: Write the equation in simplest form.

x²-4=0

Step: Solve the problem by spiltting method.

x² - 4 = 0
x² - (2)² = 0

Step: Solve the problem with using algebraic formula.

x² - 2² = 0
(x - 2)(x + 2) = 0

Step : We have used a²-b² to solve the problem.

(x - 2)(x + 2) = 0
(x - 2)(x + 2) = 0
(x - 2)=0 or (x + 2) = 0
x = 2 & - 2

Therefore, the possible values of x are 2 & - 2.

Vitek1552 [10]3 years ago

4 0

Answer:

Step-by-step explanation:

X²-4=0

x² = 4

x =√4 or x = - √4

x = 2 or x = -2

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Answer:

(f + g)(x) = 6x³ - 3x² + 7x - 8

Step-by-step explanation:

Another way of writing (f + g)(x) is f(x) + g(x). So, this question is asking you to combine both of the functions.

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2 years ago

Identify an equation in point-slope form for the line perpendicular to

Alchen [17]

Answer:

$y - 9 = \frac{1}{2}(x +3)$

Step-by-step explanation:

Given

Function; $y = -2x + 8$

Required

Find an equation perpendicular to the given function if it passes through (-3,9)

First, we need to determine the slope of: $y = -2x + 8$

The slope intercept of an equation is in form;

$y = mx + b$

Where m represent the slope

Comparing $y = m_1x + b$ to $y = -2x + 8$ ;

We'll have that

$m_1 = -2$

Going from there; we need to calculate the slope of the parallel line

The condition for parallel line is;

$m_1 * m_2 = -1$

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Divide both sides by -2

$m_2 =\frac{ -1}{-2}$

$m_2 =\frac{1}{2}$

The point slope form of a line is;

$y - y_1 = m_2(x - x_1)$

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$y - y_1 = m_2(x - x_1)$ becomes

$y - 9 = \frac{1}{2}(x - (-3))$

Open the inner bracket

$y - 9 = \frac{1}{2}(x +3)$

Hence, the point slope form of the perpendicular line is: 

 $y - 9 = \frac{1}{2}(x +3)$ 

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4 years ago

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Answer:

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Step-by-step explanation:

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4 years ago

X²-4=0 can you help me solve for x?​

X²-4=0 can you help me solve for x?