Classify the quadratic form below. Then make a change of variable, x = Py, that transforms the quadratic form into one with no cross-product term. Write the new quadratic form. - x 7 + 12 x 1 X2 - X 2 1 . . Choose the most precise classification for the quadratic form. O A. Positive definite B. Indefinite O C. Positive semidefinite O D. Negative definite O E. Negative semidefinite The new quadratic form is y Dy = (Simplify your answer.)Classify the quadratic form below. Then make a change of variable, x = Py, that transforms the quadratic form into one with no cross-product term. Write the new quadratic form - 9x1- - 12 x1X2 . . . What is the most precise classification for the quadratic form? O A. Negative semidefinite B. Indefinite O C. Negative definite O D. Positive semidefinite O E. Positive definite The new quadratic form is y Dy =