Math, asked by ar8919761, 5 months ago

7z² - 19z - 6 = ?




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Answers

Answered by Aditya1600
1

Answer:

I didn't understand!!!!!!!

Answered by nandinisahu336
0

7 {z}^{2} - 19z - 6 = 0 \\ 7 {z}^{2} - (21z - 2z) - 6 = 0 \\ 7 {z }^{2} - 21z + 2z - 6 = 0 \\ 7z(z - 3) + 2(z - 3) = 0 \\ (z - 3)(7z + 2) = 0 \\ z - 3 = 0 \: or \: 7z + 2 = 0 \\ z = 3 \: or \: z = - \frac{2}{7} \:

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