Question

help help


(x² - 4) by (x + 2)
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Answer 1

Answer:

There are two real solutions to x^2=4 (yes, opposed to imaginary solutions):

x= 2 and x=-2.

Let's look at this logically.

x^2=4 means that (x)(x)=4.

x=2 is an obvious solution, but you need to remember that a negative number multiplied by a negative number yields a positive answer.

Thus, (-2)(-2)=4 also.

Bonus: This bring us to a fundamental question: if a number squared is always positive, what is the square root of a negative number? If this question interests you, I strongly recommend researching imaginary numbers.

Hope this helps.

Answer 2

Answer:

x-2

Step-by-step explanation:

(x^2-4)/X+2

(x^2-2^2)/X+2

(X+2)(x-2)/X+2

(X+2) will be cancelled

hence x-2 is answer.

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