In the equation y = x square - BX + C, when x = - 2, y = 5; when x = - 1, y = 6 (1) find the value of B, C (2) when x = - 2, y

In the equation y = x square - BX + C, when x = - 2, y = 5; when x = - 1, y = 6 (1) find the value of B, C (2) when x = - 2, y

Take two conditions into two equations
4+2b+c=5
1+b+c=6
(1) B = - 4, C = 9
(2) Are you wrong about x? It should be 2. Y = 21