Question

factorise completely 3x^2+15x-72​

Answer 1

Step-by-step explanation:

3x^2 + 15x -72 = 0

Comparing with general equation

ax^2 +bx +c = 0

a= 3 b= 15 c = -72

Using formula method

-b +/- √b^2-4ac/2a

-15 +/- √225 +846/6

-15 +/- 33/6

-15+33/6 or -15 - 33/6

18/6 or -48/6

3 or -24/3

3 or -8

Hope it helps uh!