All categories

3 years ago

Solve by completing the square: x^2 + 7x + 4 = 0

Mathematics

1 answer:

Len [333]3 years ago

5 0

Answer:

−

Add

to both sides of the equation.

To create a trinomial square on the left side of the equation, find a value that is equal to the square of half of

(

)

(

)

Add the term to each side of the equation.

(

)

(

)

Simplify the equation.

Tap for more steps...

Factor the perfect trinomial square into

(

)

(

)

Solve the equation for

Tap for more steps...

√

−

The result can be shown in multiple forms.

Exact Form:

√

−

Decimal Form:

0.53112887

−

7.53112887

Step-by-step explanation:

You might be interested in

What is 7 to the fourth power

Snezhnost [94]

7×7×7×7 = 7^4 = 2,401

4 0

2 years ago

Read 2 more answers

_ Is –7 + 9 positive or negative

Yanka [14]

Answer:

Positive 2

Step-by-step explanation:

its like ur subtracting 9+ (-7)

its basically 9-7=2

but not all problems r like this.

Brainlest plz

5 0

2 years ago

Which polynomial does this sum of tiles represent?

Goryan [66]

U need to show an example of the tiles in order for people to answer this

8 0

2 years ago

Any number divisivble by 2 is also divisible by 8. Find a counter example to show that the conjecture is false.

Vladimir [108]

In the case of whole numbers, dividing 2 by itself would prove the conjecture false.

2/2 = 1

2/8 = 0.25

8 0

3 years ago

The radius of a semicircle is 3 feet. What is the semicircle's area?<br>Use 3.14 for Pi

valentinak56 [21]

Answer:

14.13 ft²

Step-by-step explanation:

The area of a semicircle is

$= \frac{\pi \: {r}^{2} }{2}$

We were given the radius of the semicircle to be: r=3 feet.

We were also asked to use π as 3.14.

We substitute into the formula to get:

$= \frac{3.14 \times {3}^{2} }{2}$

This is the same as:

$= \frac{3.14 \times 9}{2}$

$= 3.14 \times 4.5$

$= 14 .13 {ft}^{2}$

The area of the semicircle is 14.13 ft²

5 0

2 years ago