Question

Solve this equation, step by step, using the methods mentioned below :
3x^2-12x-15=0

Factor:

Answer 1

help i need step by step

Answer 2

i started with adding +15 to both sides

Answer 3

no use splitting middle term method or use quadratic formula

Answer 4

can you show me im a little confused

Answer 5

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

Answer 6

take common from first two terms and last two terms

Answer 7

3?

Answer 8

3x (x-5) +3 (x-5)
=(x-5) (3x+3)
=(3x+3) (x-5)
=3(x+1) (x-5)