Z to the 2nd+11 Z equals -21 over 4

1 answer:

7 0

If you're asking us to solve for Z...
z² + 11z = -21/4
4z² + 44z + 21 = 0
Enter... *drumroll* the quadratic equation!
$z = \frac{-b +- \sqrt{b^{2}-4ac}}{2a}$
(that's a plus or minus, sorry)
$z = \frac{-44 +- \sqrt{44^{2}-4(4)(21)}}{2(4)}$
x = -0.5 or -10.5

Does this help? Is it too complicated? Do you have any questions?

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