Select the perfect square trinomial for each polynomial. (there are 2 correct answers)

question 1 options:

x^2−10x−25

x^2−18x+81

x^2+2x+1

x^2+7x+49

x^2−18x+81

x^2+2x+1

Step-by-step explanation:

we know that

A trinomial is a perfect square trinomial if it can be factored into a binomial multiplied to itself

so

Verify each case

case a) x^2−10x−25

we know that

therefore

Is not a perfect square trinomial

case b) x^2−18x+81

we know that

therefore

Is a perfect square trinomial

case c) x^2+2x+1

we know that

therefore

Is a perfect square trinomial

case d) x^2+7x+49

we know that

therefore

Is not a perfect square trinomial

if x = 1, then the answer is 3.5