Question

Factor the trinomial by grouping. 45a^2-87a-42

Answer 1

3(5a+2)(3a-7)
There are way too many calculations to do this by grouping >.>

Answer 2

So that would be the answer?

Answer 3

mhmm. The grouping method is impractical for big numbers, though

Answer 4

Thank you do you think you could help me out in this one too 12x^3-52x^2-40x

Answer 5

First, you would factor out the x out of the whole equation
12x^3-52x^2-40x ---> x(12x^2-52x-40)
Then factor out 4
4x(3x^2-13x-10)
3*-10=-30
4x(3x^2-3x-10x-10)
4x(3x(x-1)+(-10(x+1))

Anyway, the final answer is 4x(3x+2)(x-5)

Answer 6

oh ok perfect that makes sense thank you so much!