c0utellKeish c0utellKeish
  • 08-11-2016
  • Mathematics
contestada

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



A. 7
B. 98
C. 196
D. 49

Respuesta :

scme1702
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
Answer Link

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