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What is 2(a+b)?

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The answer to the expression is 2a+2b. You get the answer by first removing the brackets. To do this you need to multiply both the unlike terms with 2. Since it can't be simplified further the answer is left at 2a+2b.

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use foil
first outer inner last.

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You don't use foil.
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well you kind of do just over-look the middle part
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No
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ok I was wrong i get it
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You only foil when you have two binomials. With this problem you distribute :)
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2? a 2 ? B which is 2a 2b then divide 2 on each side .. It equals ab which we know if no number is infront of a variable it equals 1 so it is 1ab

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No no no
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2a + 2b

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2a+2b
you get this by using the distributive property. To use the Distributive property you take the number outside of the parentheses, and multiply it by the first number/letter inside the parentheses. you do the same thing to the second letter/number inside. then you make an expression and or equation with it so it be 2a+2b. You cant simplify it so that is your final answer