-6b + 2(5b - 9)
Please help

4b - 18

OR

2(2b - 9)

Explanation:

Simplify the expression. Start by expanding, then collect like terms.

-6b + 2(5b - 9)                 Use the distributive property.

Multiply the number outside of the brackets with each of the terms inside of the brackets.

= -6b + 2*5b - 2*9          Multiply 2 (outside) with each term inside

= -6b + 10b - 18          Collect like terms (numbers with same variable)

= 4b - 18             Simplified expanded form

Some questions ask you to further simplify, which means they want to answer in a different form.

Factor this expression. Start by looking for a common factor.

4b - 18                 What number can both terms divide by? 2

2 is the common factor. "Take it out" like this:

= 2( 4b/2 - 18/2)          Divide each term by 2, take it outside of brackets.

= 2(2b - 9)               Simplified factored form

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