How do you factor #7x^2+5x-2#?
2 Answers
Explanation:
-2 is
Explanation:
Multiply the coefficient by the constant:
Replace it as the new constant:
Find the numbers:
So these work.
Substitute these in:
Factorise the first two expressions:
Factorise the next two expressions:
Therefore we get:
One bracket is
We can always check by expanding:
Which is the original, so we are correct.