СРОЧНО!!! Решите уравниение и проверьте, правильно ли решили:1) z^2

1)Проверка:0² - 25 · 0 = 0 25² - 25 · 25 = 00 - 0 = 0 25² - 25² = 00 = 0 0 = 02)Проверка:0² + 25 · 0 = 0 (-25)² + 25 · (-25) = 00 + 0 = 0 25² - 25² = 00 = 0 0 = 03)Проверка:0² - 1,7 · 0 = 0 1,7² - 1,7 · 1,7 = 00 - 0 = 0 1,7² - 1,7² = 00 = 0 0 = 0

vinishko420 @vinishko420

August 2022 1 8 Report

СРОЧНО!!! Решите уравниение и проверьте, правильно ли решили:

1) z^2 - 25z = 0;

2) z^2 +25z = 0;

3) z^2 - 1,7z = 0.

Answers & Comments

Veronika724

$z^2 - 25z = 0\\\\z(z-25) = 0\\\\\left[\begin{gathered}z = 0\\z - 25 = 0\end{gathered}\ \ \ \Leftrightarrow\ \left[\begin{gathered}z = 0\\z = 25\end{gathered}$

Проверка:

0² - 25 · 0 = 0 25² - 25 · 25 = 0

0 - 0 = 0 25² - 25² = 0

0 = 0 0 = 0

$z^2 + 25z = 0\\\\z(z + 25) = 0\\\\\left[\begin{gathered}z = 0\\z + 25 = 0\end{gathered}\ \ \ \Leftrightarrow\ \left[\begin{gathered}z = 0\\z = -25\end{gathered}$

Проверка:

0² + 25 · 0 = 0 (-25)² + 25 · (-25) = 0

0 + 0 = 0 25² - 25² = 0

0 = 0 0 = 0

$z^2 - 1,7z = 0\\\\z(z - 1,7) = 0\\\\\left[\begin{gathered}z = 0\\z - 1,7 = 0\\\end{gathered}\ \ \ \Leftrightarrow\ \left[\begin{gathered}z = 0\\z = 1,7\end{gathered}$

Проверка:

0² - 1,7 · 0 = 0 1,7² - 1,7 · 1,7 = 0

0 - 0 = 0 1,7² - 1,7² = 0

0 = 0 0 = 0

1 votes Thanks 1

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