Find the equation of the tangent line to y=x2+3xy = x^2 + 3xy=x2+3x at x=1x = 1x=1.
y=5x−1y = 5x - 1y=5x−1
y=5x+4y = 5x + 4y=5x+4
y=2x+2y = 2x + 2y=2x+2
y=5x−5y = 5x - 5y=5x−5