Ask Question
15 February, 09:16

Can anyone solve 4x^2 + 12x - 40? you would have to find what multiplies to get - 40 but adds to get 12, but you do something with th 4x^2 as well

+4
Answers (1)
  1. 15 February, 10:57
    0
    There's really nothing to solve, since there's no equation there.

    Perhaps you want that expression factored. We can do that.

    First, all 3 terms share a common factor of 4. Let's pull that out,

    and see what's left to be factored:

    4x² + 12x - 40 = 4 (x² + 3x - 10).

    Now, the expression left inside the parentheses looks

    like it might be a lot easier to handle.

    Here's what the whole expression looks like after the

    quadratic inside the parentheses is factored:

    4 (x² + 3x - 10) = 4 (x + 5) (x - 2).

    There it is. Understand ... we haven't changed anything,

    and we haven't solved anything. We only wrote the original

    expression in a different form. It's still just an expression that

    stands for a number, and we won't know the number until

    somebody tells us the value of 'x'.
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “Can anyone solve 4x^2 + 12x - 40? you would have to find what multiplies to get - 40 but adds to get 12, but you do something with th 4x^2 ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers