What value in place of the question mark makes the polynomial below a perfect square trinomial ?

x2+22x+?

a.)22
b.)44
c.)11
d.121

The correct answer option is D. 121.

Step-by-step explanation:

We are given the following incomplete polynomial and we are to determine whether which of the given value in the options will make it a perfect square trinomial.

From the given options, only one of them is a perfect square which is 121 so let us check if that is true.

Factorizing it to get:

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40