What is equivalent to this formula: y=3 (x+5) (x-2)

y = 3 * (x^2) + 9x - 30

Step-by-step explanation:

y=3 (x+5) (x-2)

y = (3*x + 3*5) * (x - 2)

y = (3*x + 15) * (x - 2)

y = 3*x*x + 3*x * (-2) + 15*x + 15 * (-2)

y = 3 * (x^2) - 6x + 15x - 30

y = 3 * (x^2) + 9x - 30