It is known that y is positively proportional to the square of X, and when x = - 1, y = - 3 (1) is the functional relation between Y and X

It is known that y is positively proportional to the square of X, and when x = - 1, y = - 3 (1) is the functional relation between Y and X

Y is proportional to the square of X
y=kx²
When x = - 1, y = - 3
－3＝k
y=－3x²

Formula method of mathematical quadratic function y = square-4x of X

y=x^2-4x+4-4=（x^2-4x+4）-4=（x-2）^2-4

2's square + 3's square + 4's square + 5's square + 6's square + 7's square + 8's square + 9's square + 10's Square

It's OK to add less numbers, but you can also use this formula
S = (1 / 6) * n * (n + 1) * (2 * n + 1) calculate the sum of the series in the form of {n ^ 2}. In this problem, the result of subtracting 1 from the first term is: 384