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kakasveta [241]
3 years ago
12

Help me solve this4 — (x-2) (x+2)​

Mathematics
1 answer:
LekaFEV [45]3 years ago
4 0

Using (x-a)(x+a)=x^2-a^2 to obtain

4-(x^2-4)=4-x^2+4=8-x^2

Hope this helps.

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The length of a rectangle is 5 inches more than twice a number.The width is 4 inches less than the same number.If the area of th
umka2103 [35]

Answer:

n = 5, n = -7/2

Step-by-step explanation:

2n + 5 = l

n - 4 = w

A = l × w = 15

(2n + 5)(n-4) = 15

2n^2 - 8n + 5n - 20 = 15

2n^2 -3n - 35 = 0

(2n + 7)(n - 5) = 0

2n + 7 = 0      or       n - 5 = 0

n = -7/2          or       n = 5

6 0
3 years ago
Hello Please Find The Answer To This Question (easy)
irina [24]

The equation of the line that is perpendicular to y = -5/2 x + 1 and passing through (10, 3) will be y = 2/5 x + 1.

<h3>What is the linear system?</h3>

A linear system is one in which the parameter in the equation has a degree of one. It might have one, two, or even more variables.

The equation of the perpendicular line will be given as

y = mx + c

The given equation is y = -5/2 x + 1.

The slope of the line is -5/2.

Then the product of the slope of the perpendicular lines is a negative one.

-5/2 × m = - 1

m = 2/5

Then the equation will be

y = 2/5 x + c

Then the equation is passing through (10, 3). Then we have

3 = 2/5 × 10 + c

3 = 2 + c

c = 1

Then the equation is y = 2/5 x + 1.

More about the linear system link is given below.

brainly.com/question/20379472

#SPJ1

7 0
2 years ago
Find f(−1) given that f(x)=x3+2x2+3x+4. <br>A. 10 <br>B. -2 <br>C. 2 <br>D. -10
Finger [1]

Answer:

The answer is option C

Step-by-step explanation:

f(x) = x³ + 2x² + 3x + 4

To find f(-1) substitute the value of x that's

- 1 into f(x)

That's

<h3>f( - 1) =  ({ - 1})^{3}  + 2 ({ - 1})^{2}  + 3( - 1) + 4 \\  =  - 1 + 2(1)  - 3 + 4 \\  =  - 1 + 2 - 3 + 4 \\  = 1 - 3 + 4</h3>

We have the final answer as

<h3>f( - 1) = 2</h3>

Hope this helps you

8 0
3 years ago
Please help!!! Number 8 please
Verdich [7]

Answer:

21.43 mph

Step-by-step explanation:

:)

4 0
2 years ago
Aaron's plane flew 4.5 m. Noah's plane only flew half the distance that Aaron's plane flew. How many centimeters further did Aar
Alenkinab [10]
Aaron's plane flew 2.25 cm More than noah's plane
3 0
3 years ago
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