Paul M. answered • 10/30/18

Learn "how to" do the math and why the "how to" works!

The direct answer is: leave the 2 until the end. Use the distributive law to multiply the trinomial by the binomial, then multiply by 2.

However, you did this the hard way: you should start with the square first

2(x^{2} + 2x + 1)(x-3) now use the distributive law and finally multiply by 2.

You should remember that the square of a binomial is: the square the first + twice the first times the second + the square of the second.

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