Talib is trying to find the inverse of the function to the right. His work appears beneath it. Is his work correct? Explain your
1 answer:
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Use the FOIL method.
2x * x + 2x * 6 + -9 * x + -9 * 6
Combine like terms.
<u>Answer</u>
Answer:
The correct option is (A).
Step-by-step explanation:
If the reduced row echelon form of the coefficient matrix of a linear system of equations in four different variables has a pivot, i.e. 1, in each column, then the reduced row echelon form of the coefficient matrix is say A is an identity matrix, here I₄, since there are 4 variables.
Then the corresponding augmented matrix [ A|B] , where the matrix is the representation of the linear system is AX = B, must be:
Now the given linear system is consistent as the right most column of the augmented matrix is a linear combination of the columns of A as the reduced row echelon form of A has a pivot in each column.
Thus, the correct option is (A).