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where is the intp ?

Very true, any INTJ or INTP can provide a typical concrete answer to this question. So..where is the intp ?

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1,243 Posts

The negative sign is an operator, a symbol which denotes performing a mathematical operation. In this case, the operation is multiplying the number by -1 which changes the sign from either positive to negative or negative to positive. For example, -1 x 25 = -25.

When you multiply two negative numbers there's an additional sign change present. For example, -25 x -5 = 125. If you break it down and consider the integers first and the operators later you get: (25 x 5) x -1 x -1 = 125 x -1 x -1. Then 125 x -1 = -125. And finally -125 x -1 = 125.

Essentially: multiplying a negative by a negative yields a positive. Dividing a negative by a negative yields a positive.

Because I'm lazy and because they explain it better :kitteh:

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373 Posts

It's about multiplication not additionCan anyone of you explain me this logic of why negative+negative is positive? I was trying to clear it out, but I wasn't getting the apt answer by myself.

The simplest way to explain it:

(-) + (-) = (-)

(-) X (-) = (+)

(-) X (+) = (-)

(+) X (-) = (-)

(+) X (+) = (+)

My concept is much clear now.

Really, thank you for the replies people.

@bluebatteries- Is positive is always on right and negative is always on left in terms of mathematics?

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613 Posts

(-:tongue::tongue + (-:tongue::tongue = -:tongue::tongue::tongue::tongue:

it's like when smileys don't show up for class

(-2) + (-2) = -4 absent smileys

Not all feelers requires smiley, logic is enough.

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2,984 Posts

That's the 'standard' way to depict the number line because we read from left to right. But there's no reason to keep it that way if you find another way easier to understand - top to bottom, a circle, a hyperplane, whateverIs positive is always on right and negative is always on left in terms of mathematics?

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3,145 Posts

Thank you. ^^

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3,145 Posts

Wait... I made sense? [awesome avatar! Internet Farms, go /b/!]

Oh no, I'm sorry but that 'thank you' was for Blue Ocean.I didn't see your post before, but thanks for contributing.I already got the reason! PS- thanks for that avatar complimentWait... I made sense? [awesome avatar! Internet Farms, go /b/!]

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9,303 Posts

YES!!! Ace Face is BACK!!

Erm, off topic.

Erm, off topic.

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9,303 Posts

Hehe, **hug, hug** <---double hug!YES!!! Ace Face is BACK!!

Erm, off topic.

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1,060 Posts

They've given:

ab+ (-a)(b) + (-a)(-b)

= ab+ -a(+b-b)

what if they had taken the 'ab' as a common? Is it a rule that we can either take a or b as a common? Or the sum wouldn't work if we take it as 'ab'?

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2,984 Posts

This is a lazy response as I haven't watched the video

They've given:

ab+ (-a)(b) + (-a)(-b)

= ab+ -a(+b-b)

what if they had taken the 'ab' as a common? Is it a rule that we can either take a or b as a common? Or the sum wouldn't work if we take it as 'ab'?

If you combine the 'ab' terms, this is what you get:

ab + (-ab) + (-a)(-b) = ab - ab + ab = ab

What you've shown above is taking out -a as a common factor which means that the b's cancel out and so you're left with just the ab. If you want to take out the b's instead, you could write the original expression as:

(a-a)(b) + (-a)(-b) = 0 + ab = ab

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