Factor the trinomial 7x2 – 3x – 4. which pair of numbers has a product of ac and a sum of b? what is the factored form of the trinomial?

The pair of numbers are -7 and 4

The factored form is given by

Step-by-step explanation:

The given trinomial is

Comparing, with the equation

a = 7

b = -3

c = -4

In order to write in factored form, we use AC method.

In AC method, first of all we find the product of A and C.

ac = 7×(-4)

ac = -28

Now, we find the factor pairs of 28 such that the product is equal to ac and the sum/difference is equal to b.

-28 =  1×(-28),  (-28)×(1),  7×(-4) ,  (-7)×(4)

Among these factors pairs,  (-7)×(4)  is the correct choice because

(-7)×(4)  = -28

-7 +4 = -3

Hence, the numbers are -7 and 4

Now, we write the middle term -3x as -7x+4x

Factor out GCF

Factored out the common term

Hence, the factored form is given by

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.