Question

Factor: 15x2+−14x+3

x2 is x to the second power

Answer 1

What is with the "+-"?  If that was intended, the effect is just having a -

15x^2-14x+3

15x^2-5x-9x+3

5x(3x-1)-3(3x-1)

(5x-3)(3x-1)

If you meant:

15x^2+14x+3

15x^2+9x+5x+3

3x(5x+3)+1(5x+3)

(5x+3)(3x+1)

Answer 2

Hi there!

15x² - 14x + 3
= (5x -3)(3x-1)