Metrics last two questions please Compute the determinant using a cofactor expansion across the first row. Also compute the determinant by a cofactor expansion down the second column.7-78.8.8 -1Write the expression for the determinant using a cofactor expansion across the first row. Choose the correct answer below.O A. Using this expansion, the determinant is (7X55) -(-7)(71) + (8)(65).O B. Using this expansion, the determinant is (7)-57)+(-7X-15) + (8X63).OC. Using this expansion, the determinant is (7X55) +(-7)(71) + (8)(65).O D. Using this expansion, the determinant is (7X-57)-(-7X-15) + (8X63).Write the expression for the determinant using a cofactor expansion down the second column. Choose the correct answer below.A. Using this expansion, the deteminant is (-7X-15) + (1X-15) + (8X-15).B. Using this expansion, the determinant is -(-7X-1)+(1X1)-(8)(113).OC. Using this expansion, the determinant is -(-7X-15) + (1X-15)- (8X-15).D. Using this expansion, the determinant is (-7X-1) + (1)(1) (8X113).The determinant is(Simplify your answer.)

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Algebra

Compute the determinant using a cofactor expansion across the first row. Also compute the determinant by a cofactor expansion down the second column. 7-7 8. -1

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter6: Linear Systems

Section6.5: Determinants

Problem 79E

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Metrics last two questions please

Compute the determinant using a cofactor expansion across the first row. Also compute the determinant by a cofactor expansion down the second column.
7-7
8.
8.
8 -1
Write the expression for the determinant using a cofactor expansion across the first row. Choose the correct answer below.
O A. Using this expansion, the determinant is (7X55) -(-7)(71) + (8)(65).
O B. Using this expansion, the determinant is (7)-57)+(-7X-15) + (8X63).
OC. Using this expansion, the determinant is (7X55) +(-7)(71) + (8)(65).
O D. Using this expansion, the determinant is (7X-57)-(-7X-15) + (8X63).
Write the expression for the determinant using a cofactor expansion down the second column. Choose the correct answer below.
A. Using this expansion, the deteminant is (-7X-15) + (1X-15) + (8X-15).
B. Using this expansion, the determinant is -(-7X-1)+(1X1)-(8)(113).
OC. Using this expansion, the determinant is -(-7X-15) + (1X-15)- (8X-15).
D. Using this expansion, the determinant is (-7X-1) + (1)(1) (8X113).
The determinant is
(Simplify your answer.)

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