11th grade
posted by emms .
solve a perfect square trinomial equation.
(4x+1)(x+4)=49

Rewrite it by multiplying it out, and factor.
4x^2 + 17x 45 = 0.
I don't see any "perfect square" here.
It also does not factor easily. Use the quadratic equation.
x = [17 +/ sqrt(1009)]/8
x = 1.846 is one of the two solutions