Question

(Z+3) (Z-3) - Z (Z+5)=6​

Answer 1

Answer:

Step-by-step explanation:

(z+3)(z-3) -z(z+5)=6

z²-3 -z²-5z=6

-5z=9

z= -1.8

Answer 2

Answer:

$z = - 3$

Step-by-step explanation:

$(z + 3)(z - 3) - z(z + 5) = 6$

$z {}^{2} - 9 - z(z + 5) = 6$

${z}^{2} - 9 - (z {}^{2} + 5z) = 6$

$z {}^{2} - 9 - z {}^{2} - 5z = 6$

$- 9 - 5z = 6$

$- 5z = 6 + 9$

$- 5z = 15$

$z = \frac{15}{ - 5}$

$z = - 3$

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