Help every answer I get is wrong rationalize the denominator

Step-by-step explanation:

1.  multiply by a fraction with just the denominator but the opposite sign in between

2. multiply the 1st numerator by the other numerator and the 1st denominator by the other denominator

3. the numerator simplifies to and the denominator to y-49

4. expand the numerator and you should get the answer

true

explanation:

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,