Find the value of c such that the expression is a​ perfect-square trinomial. x^(2) +18x+c c = ?

Question

Find the value of c such that the expression is a​ perfect-square trinomial.


`x^(2) +18x+c`
c = ?

Answer 1

81

Explanation:

perfect-square trinomial form: a² +2ab +b²

a = x

2ab = 18x = 2 * x * 9

c = 9*9 = 81