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Safari File Edit View History Bookmarks Window Help Home Tools CS AFCEA Educat CL A Richie Kotze... 4) WeBwork M Patrick JMT Sun Devil Care Happy Healthy Organic Protei How To Make Career Service... Amazon.com 3 Ways To Ma... Book AK Do Section 2.1 Determinant. Problem 11 Previous Problem List Next Li (1 point) Given the matrix a 9 9 7 9 6 a find all values of a that make the LAl 0. Enter the values of a as a comma-separated list 54/7,49/6,-63/-6 Ch Diag Eig Preview My Answers ubmit Answers Eig Ch Forn A Ch Fund You have attempted this problem 1 time. Dual Your overall recorded score is 0% Ch Qua You have unlimited attempts remaining Herr A Ch Op Proc Wed Feb 10 10:44 PM a E Advanced Mat... Gauss-Jordan...

Explanation / Answer

|A| = a(-7a+54) - 9(a2 - 63) + 9(-6a+49)

|A| = -7a2 + 54a - 9a2 + 567 - 54a + 441

|A| = -16a2 + 1008

so |A| = 0

hence ,

-16a2 + 1008 = 0

so,

16a2 - 1008 = 0

taking 16 common we have,

a2 - 63 = 0

so,

(a-631/2) * (a+631/2) = 0

so,

a = (63)1/2 and a = -(63)1/2

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