Mathematics problems of quadratic function in the second day of junior high school
Primitive quadratic function y=x? -2x+ 1 means y=(x- 1)? The vertex of is (1, 0)
It translates 2 units up and 3 units to the left.
The vertex of the new quadratic function is (1-3,0+2), that is, (﹣2,2), and its vertex Y = ﹙ x+2 ﹚? +2, the general formula is y = x? +4x+6 and y=x? +bx+c comparison shows that b = 4 and c = C