Question

Select one of the factors of 3x^2 + 12x – 36
Answer
6
x – 3
x + 2
x + 6

Answer 1

3{x^2 + 4x - 12}
=> 3{ x^2 + 6x - 2x -12 }
=>3{ x( x+ 6) - 2(x +6) }
=> 3{(x+6)(x-2)}
=> 3(x+6)(x-2)
hence x+6 is a factor