Question

Z^2-18z=-19 find for z

Answer 1

The 2 roots of z are: 16.874, 1.126

Explanation:

z² - 18² = -19

z² - 18² + 19 = 0

Find the roots of z by using the quadratic equation with a = 1, b = -18, c = 19:

z = -(-18)±(√(-18)² - 4(1)(19)) / 2(1) = (18 ± √248) / 2

z = 16.874, 1.126