Best Answer

Look for something which you can divide both terms by. In this case both 3x and 15 are divisible by 3, so put this outside of a bracket and write the two terms divided by the common factor inside the bracket. So the answer is 3(x+5).

Q: How do you factor 3x plus 15?

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3(3x + 5)

3 is a factor and dividing by 3 gives x + 15 = 8x

3(x2 + 3x + 1)

3x2 + 10x + 3 = (x + 3)(3x + 1).

9x2 + 6x + 1 = 9x2 + 3x + 3x + 1 = 3x(3x + 1) + 1(3x + 1) = (3x + 1)(3x + 1) or (3x +1)2

Related questions

3x^2 -14x +15 = (3x-5)(x-3)

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15x2+16x-15 = (3x+5)(5x-3) when factored

3X + 8You don't factor this as there are no common factors.

(-3x - 1)(3x - 7)

3 is a factor and dividing by 3 gives x + 15 = 8x

3(x2 + 3x + 1)

(3x + 1)(x + 5)

(x + 5)(3x + 1)

It is: 3x*(x+7)

3x(2y + 1)