brain whiff...why is this true?

[erlikprime]

2-(1-x) = x+1

 

[Deleted member 4993]

2-(1-x) = x+1

\(\displaystyle 2 - (1 - x) = 2 + (-1) * (1 - x) = 2 + (-1 + x) = 2 - 1 + x = 1 + x\)

 

[erlikprime]

thanks alot

 

[queendiva_314]

how do you do this -6(a+8)

 

[mmm4444bot]

how do you [multiply] this -6(a+8)

Apply the Distributive Property:

A(B + C) = (A)(B) + (A)(C)

In other words, each of the numbers inside the parentheses gets multiplied by the number in front of the parentheses.

The number B gets multiplied by A, and the number C gets multiplied by A:

AB + AC

Can you see that the expression -6(a + 8) has the same form as the expression A(B + C) ?

Apply the Distributive Property.

Both numbers inside the parentheses (the number 'a' and the number 8) get multiplied by the factor in front (-6).

PS: Please use the [NEWTOPIC] button on the board's index page (upper left area) to start your own thread, next time. Cheers