It's so simplewhat number should be added to the expression x²+2x to change it into a perfect square trinomial? 1249

The answer is choice A) 1

We cut the x coefficient 2 in half to get 1. Then we square 1 to get 1
Note: 1^2 = 1*1 = 1

x^2+2x+1 is a perfect square trinomial that factors to (x+1)^2

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for