SOLUTION: Find the value of n so that the expression is a perfect square trinomial. Thank you. x^2-7x+n

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Find the value of n so that the expression is a perfect square trinomial. Thank you. x^2-7x+n       Log On


   

Question 1195762: Find the value of n so that the expression is a perfect square trinomial. Thank you.
x^2-7x+n
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2-7x%2Bn
JUST THE TWO FIRST TERMS and add a term,
x%5E2-7x%2B%287%2F2%29%5E2
%28x-7%2F2%29%5E2, perfect square

n=%287%2F2%29%5E2