I WILL BECOME A FAN AND GIVE A MEDAL

What is the value of c so that y = x^2 + 10x + c is a perfect square trinomial?

A. 10
B. 25
C. 50
D. 100

Please tell me the answer and how you got it! Thanks ya'all!

Question

I WILL BECOME A FAN AND GIVE A MEDAL

What is the value of c so that y = x^2 + 10x + c is a perfect square trinomial?

A. 10
B. 25
C. 50
D. 100

Please tell me the answer and how you got it! Thanks ya'all!

anonymous · Answer

B, u have to divide 10 by to then square it

anonymous · Answer

becasuse 10 is the 2nd coefficient

anonymous · Answer

Thanks so much! Could you help me with another one please? :)

anonymous · Answer

sure :)

anonymous · Answer

What is the value of c so that x^2+9x+c is a perfect square trinomial?

A. 81
B. 81/2
C. 81/4
D. 9/2

Thanks again! :)

zzr0ck3r · Answer

is half the b term squared

anonymous · Answer

C, 4.5^2

the_fizicx99 · Answer

$\ (a+b)^2 = a^2 + 2(a)(b) + b^2 $ 

A is x and B would be 5 because $\ \dfrac{10}{2} = 5 $ 

$\ x^2 + 2(x)(5) + 5^2 = x^2 + 10x + 25 $