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 ..

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.