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3 years ago

7n-(4n-3) simply to create a equivalent expression?

Mathematics

1 answer:

Naya [18.7K]3 years ago

4 0

Answer:

3n + 3

Step-by-step explanation:

Step 1:

7n - 4n + 3

Answer:

3n + 3

Hope This Helps :)

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Please help me out The equation 9(w + 7) = 27 solved in several steps below. For each step, choose the reason that best justifie

Vaselesa [24]

9w+63=27

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3 years ago

What are the solution(s) of x2-4-0?

Elanso [62]

Answer:

For $x^2 - 4 = 0$ , x = 2, or x = - 2.

Step-by-step explanation:

Here, the given expression is :

$x^2 - 4 = 0$

Now, using the ALGEBRAIC IDENTITY:

$a^2 - b^2 = (a-b)(a+b)$

Comparing this with the above expression, we get

$x^2 - 4 = 0 = x^2 - (2)^2 = 0\\\implies (x-2)(x+2) = 0$

⇒Either (x-2) = 0 , or ( x + 2) = 0

So, if ( x- 2) = 0 ⇒ x = 2

and if ( x + 2) = 0 ⇒ x = -2

Hence, for $x^2 - 4 = 0$ , x = 2, or x = - 2.

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NeTakaya

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2 years ago

The boss gives all his employees a 4% pay rise.

PtichkaEL [24]

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