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jeka94
3 years ago
7

(x+4)^2-(x+2)(x-2)=20

Mathematics
2 answers:
koban [17]3 years ago
7 0

⇒x²+ 4² - x²+ 2x - 2x + 4 = 20

⇒ x² - x² + 2x - 2x + 4² + 4 = 20

⇒ 16 + 4 = 20

⇒ 20 = 20

RHS = LHS hence proved

Answered by Gauthmath must click thanks and mark brainliest

Trava [24]3 years ago
5 0

Answer:

x = 0

Step-by-step explanation:

(a + b)² = a² +2ab + b²

(a +b)(a -b)= a² - b²

(x + 4)² - (x + 2 )(x - 2) = 20

x² + 2*4 *x + 4² - [x² - 2²] = 20

x² + 8x + 16 - [x² - 4]  = 20

x² + 8x + 16 - x²  + 4   = 20                 {(-1) is distributed x² and (-4)²}

<u>x² - x²</u> + 8x +<u> 16 + 4  </u>   = 20 <u>{</u>Combine like terms<u>}</u>

                      8x + 20   = 20

                           8x      = 20 - 20

                               8x   = 0

x = 0

                                 

                           

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fomenos

Answer:

The rearrangement of the terms is 4x^2-6x^2-6x+3x+3-4.

Step-by-step explanation:

The given expression is

3-6x+4x^2+3x-6x^2-4

Two terms are called like terms if they have same variables having same degree.

In the given expression 3 and -4, -6x and 3x, 4x² and -6x² are like terms.

Arrange the given terms according to their degree and arrange in this way so like terms are next to each other.

4x^2-6x^2-6x+3x+3-4

Therefore the rearrangement of the terms is 4x^2-6x^2-6x+3x+3-4.

7 0
3 years ago
O A box contains 40 oranges, 12 of which are
konstantin123 [22]

Step-by-step explanation:

Nø of sample space, n(s) = 40

nø of unripe oranges, n (u) = 12

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The probability that it is ripe is, P(E)

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= 28 / 40

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Also the probability that it is unripe is, P(E)

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5 0
3 years ago
Hiroshi has 4 engines and 18 box cars. Find the ratio of engines to box cars. Write the ratio as a fraction in simplest form.
lyudmila [28]
To write a ratio as a fraction, we simply take the first number in the ratio and make it the numerator while taking the second number in the ratio and making it the denominator.

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When we substitute in our respective values, we get:

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To simplify this ratio, we have to find the GCF, or greatest common factor of the numerator and the denominator, which in this case is 2. To simplify, we divide both the numerator and the denominator by the GCF, as follows:

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3 years ago
18 = -5b - 17<br><br><br> help?
cricket20 [7]
Its b= -0.2 or b= 1/-5 whichever one works best 
4 0
4 years ago
Read 2 more answers
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kogti [31]

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Step-by-step explanation:

The notation to express a dependent variable is given by :-

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Here , Independent variable : Time

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