If h(x)=x2+2xh(x) = x^2 + 2xh(x)=x2+2x, find h(a+1)h(a+1)h(a+1).
a2+4a+3a^2 + 4a + 3a2+4a+3
a2+2a+1a^2 + 2a + 1a2+2a+1
a2+4a+1a^2 + 4a + 1a2+4a+1
a2+3a^2 + 3a2+3