Which equation involves a prime quadratic and cannot be solved by factoring? a. x2 + 5x − 4 = 0 b. x2 − x − 6 = 0 c. x2 + 3x − 4 = 0 d. x2 + 6x + 9 = 0 reset

Option A

Step-by-step explanation:

We can try to factorize all the options one by one.

For A:

We can see that the quadratic expression cannot be solved by factorization as the factors at the end of factorization are not equal in both brackets. So Option A is the correct answer for the given question.

Moreover we can also note that all the other quadratic expressions can be factorized ..