Q. Apply the distributive property to factor out the greatest common factor.15+21=□
Identify GCF of 15 and 21: Identify the greatest common factor (GCF) of 15 and 21.The factors of 15 are 1, 3, 5, and 15.The factors of 21 are 1, 3, 212, and 21.The greatest common factor of 15 and 21 is 3.
Factor out GCF from 15+21: Use the distributive property to factor out the GCF from the expression 15+21.We can write 15 as 3×5 and 21 as 3×7.So, 15+21 can be written as 3×5+3×7.
Apply distributive property to factor out GCF: Apply the distributive property to factor out the GCF, 3. This gives us 3(5+7).
Simplify expression inside parentheses: Simplify the expression inside the parentheses.5+7=12.So, the factored form is 3(12).