solve the linear equation (z+3)(z-3)-z(z+5)=6
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Step-by-step explanation:
z +3 + z - 3 - z^2 - 5z = 6
z + z - z^2 - 5z = 6 - 3 + 3
2z - z^2 - 5z = 6
z - z^2 - z = 6/2×(-5)
- z^2 = 6/-10
z = √6/10
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