7: Make a change of variable, : - Py, that transforms the following quadratic form into one with no cross-product terms. x+x-6x1x2-14x1x3-14x1x4-14x2x3-14x2x4-4x3x4 Construct P using the methods of Section 7.1. For the associated quadratic form, enter the eigenvalues in decreasing order (including multiplicities) into the answer box below, separated with commas.

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Q: (1) Solve the following differential equation Solution: 16d¹y dx4 d²y +24- dx2 +9y= 0.

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Q: 1 1 12. A 1 3 0,b= ,w [1-3-3] 3. -1 16. If A is the matrix in Exercise 12, is v = in null(A)?

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Q: Plz solve correctly all parts Will definitely upvote

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