Answer:
1800
Step-by-step explanation:
15x12x10= 120x 15= 1800
No
it's not always possible to factor a quadratic expression of this factoring by grouping. The method doesn't work when an expression cannot be factored as (Ax+B)(Cx+D) where A, B, C and D are integrers.
In that case, you should use other methods.
-3x + 7x = 4x
