What is the answer to this problem.

2y^2 - y - 1 = 0
(2y + 1) (y - 1) = 0 
2y + 1 = 0    or    y - 1 = 0
y = -1/2        or    y = 1

When you factor this, you should get ( y - 1 )( 2y + 1 ) One of these inside the parenthesis has to equal 0, so the answer is either 1 or -1/2.

You move the constant to the right side and change its sign to be 9z= -6 -8. that’s the first step.the second step would be calculate the difference of -8-6 to get -14. you equation should now be 9z=-14the last step is to divide both sides by 9 to get z=-14/9hope this