Matematică >> Drepta în plan >> 6
\( d \) : \( \displaystyle \frac {x - \color{red}x_A}{\color{orange}x_B \color{grey} - \color{red}x_A} = \frac {y - \color{blue}y_A}{\color{green}y_B \color{grey} - \color{blue}y_A} \).
\( d \) : \( \displaystyle \frac {x - \color{red}x_A}{\color{orange}x_B \color{grey} - \color{red}x_A} = \frac {y - \color{blue}y_A}{\color{green}y_B \color{grey} - \color{blue}y_A} \)
\( d \) : \( \displaystyle \frac {x - \color{red}3}{\color{orange}-2 \color{grey} - \color{red}3} = \frac {y - \color{blue}(-5)}{\color{green}6 \color{grey} - \color{blue}(-5)} \)
\( d \) : \( \displaystyle \frac {x - 3}{-5} = \frac {y + 5}{11} \)
\( d \) : \( 11( x - 3 ) = - 5( y + 5 ) \)
\( d \) : \( 11x - 33 = - 5y - 25 \)
\( d \) : \( 11x + 5y - 33 + 25 = 0 \)
\( d \) : \(11x + 5y - 8 = 0 \).
Ecuația dreptei \( d \) care trece prin punctele \( A( \color{red}6 \color{grey}, \color{blue}2) \)
și \( B( \color{orange}0 \color{grey}, \color{green}10) \) este dată de formula:
\( d \) : \( \displaystyle \frac {x - \color{red}x_A}{\color{orange}x_B \color{grey} - \color{red}x_A} = \frac {y - \color{blue}y_A}{\color{green}y_B \color{grey} - \color{blue}y_A} \)
\( d \) : \( \displaystyle \frac {x - \color{red}6}{\color{orange}0 \color{grey} - \color{red}6} = \frac {y - \color{blue}2}{\color{green}10 \color{grey} - \color{blue}2} \)
\( d \) : \( \displaystyle \frac {x - 6}{-6} = \frac {y - 2}{8} \)
\( d \) : \( 8( x - 6 ) = -6( y - 2 ) \)
\( d \) : \( 8x - 48 = - 6y + 12 \)
\( d \) : \( 8x + 6y - 48 - 12 = 0 \)
\( d \) : \( 8x + 6y - 60 = 0 \)
\( d \) : \( 4x + 3y - 30 = 0 \).