3 years ago

Which equation is equivalent to

Mathematics

2 answers:

konstantin123 [22]3 years ago

6 0

It is the last equation. You square both sides.

Xelga [282]3 years ago

3 0

The last equation is correct

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Answer:

15.75

Step-by-step explanation:

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2 years ago

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The length of a rectangular floor is 2 feet more than its width. The area of the floor is 168 square feet. Kim wants to use a ru

ioda

Let width of the floor be x feet, them area is
x(x+2) = 168
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3 years ago

A-b.a+b=<br> giúp mình nhé

lilavasa [31]

Step-by-step explanation:

Did you mean:

= (a - b)(a + b)

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2 years ago

Which shows the expression x^2-1/x^2-x in simplest form

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Answer:

$\large\boxed{\dfrac{x+1}{x}=1+\dfrac{1}{x}}$

Step-by-step explanation:

$\dfrac{x^2-1}{x^2-x}=(*)\\\\x^2-1=x^2-1^2\qquad\text{use}\ a^2-b^2=(a-b)(a+b)\\=(x-1)(x+1)\\\\x^2-x=(x)(x)-(x)(1)\qquad\text{use the distributive property}\\=x(x-1)\\\\(*)=\dfrac{(x-1)(x+1)}{x(x-1)}\qquad\text{cancel}\ (x-1)\\\\=\dfrac{x+1}{x}=\dfrac{x}{x}+\dfrac{1}{x}=1+\dfrac{1}{x}$

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3 years ago

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