c0utellKeish c0utellKeish

08-11-2016
Mathematics

Answered

What is the value of c such that: x2 + 14x + c, is a perfect-square trinomial?

A7
B98
C196
D49

Verified Answer :

scme1702 scme1702

12-11-2016

We know that in a perfect square trinomial, the terms are:
a² + b² + 2ab
Here we have x = a. So b is:
14x = 2(x)(b)
b = 7
To complete the trinomial, we need b²
7² = 49
Option D is the answer

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