x+7x2+4x−21
1/x-3 : where x not = 3
x-3
1 / x-7
x-7
To factorize the expression x+7x^2+4x-21, we can first combine like terms:
x + 7x^2 + 4x - 21
= 7x^2 + 5x - 21
Now, we can factorize this quadratic expression:
7x^2 + 5x - 21 = (7x - 9)(x + 3)
Therefore, the factored form of the expression x + 7x^2 + 4x - 21 is (7x - 9)(x + 3).