What number goes in the question mark so that the quadratic is the square of a binomial? 9x^2 +6x+ x^2 + 4x + ?
+37146 9x^2 +6x+ x^2 + 4x + ?
10x^2 +10x +?
10 *(x^2 +x)
10 (x+1/2)^2
10 ( x^2 + x + 1/4 )
10x^2 + 10x + 2.5 = ( sqrt 10 x + 1/2 sqrt(10) )^2
