Practice problem
Which function y(x)y(x)y(x) below has non-real roots?
y=−x2−2x−1y=-x^2-2x-1y=−x2−2x−1
y=2x2−x+12y=2x^2-x+12y=2x2−x+12
y=3x2+4x−7y=3x^2+4x-7y=3x2+4x−7
y=−12x2+3x2+25y=-\frac{1}{2}x^2+3x^2+25y=−21x2+3x2+25
Type a concept, like “slope” or “photosynthesis”.