SOLUTION: Please, can anyone help me solve the following problem. Thank you. What positive value of k will the expression 9x^2 +kx + 25 factor into the form(ax+b)^2 for some real number

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Please, can anyone help me solve the following problem. Thank you. What positive value of k will the expression 9x^2 +kx + 25 factor into the form(ax+b)^2 for some real number       Log On


   



Question 340283: Please, can anyone help me solve the following problem. Thank you.
What positive value of k will the expression 9x^2 +kx + 25 factor into the form(ax+b)^2 for some real number a and some real number b?

Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
9x^2 +kx + 25
..
(3x)^2+kx+5^2
2*3*5 = 30
so k=30
(x^2+30x+25
(3x+5)^2