In which quadrant does 2 - 7i lie? i ii iii iv

This is a problem of complex number. So we have a coordinate system with two axis. The horizontal axis represents the real numbers and the vertical axis represents the imaginary numbers. Given that a complex number is given by the form a + bi, if we set the point 2 - 7i on the coordinate system it is obvious that lies over the IV quadrant.

Aquadratic function is one of the form f(x)=ax2 + bx + c l, where a,b, and c are numbers with are not equal to zero.