Given the function y = (M & # 178; - M) x & # 178; + MX + (M + 1) (M is a constant), when m is a value, 1. The function is a linear function 2. The function is a quadratic function

Given the function y = (M & # 178; - M) x & # 178; + MX + (M + 1) (M is a constant), when m is a value, 1. The function is a linear function 2. The function is a quadratic function

When m = 1, it is a linear function, and when m is not equal to 0 and 1, it is a quadratic function
He asked if you are a function, you just let the coefficient of quadratic form be zero

For quadratic function y = AX2, when x increases from 1 to 2, the value of function decreases by 4, then what is the value of constant a

4a-a=-4
a=-4/3