Mathematics: Give an example of a geometric formuka that xontainas pi

Give an example of a geometric formuka that xontainas

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tamya12234

04.08.2022

$1.)\\ \\\begin{cases}-4x + y = -12\\ 4x + 2y = 6 \end{cases}\\ -------- \\ 3y=-6/:3\\ \\y=-2\\ \\-4x+2=-12\\ \\-4x=-12+2$

$-4x=-10/:(-4)\\ \\x=\frac{10}{4}\\ \\x=\frac{5}{2}\\ \\\begin{cases}x=\frac{5}{2} \\y=-2\end{cases}$

$2.)\\ \\\begin{cases}5x + 2y = 12\\ -6x - 2y = -14 \end{cases}\\ -------- \\ -x=-2/*(-1)\\ \\x=2\\ \\5*2+2y=12$

$10+2y=12 \\2y=12-10\\ \\2y=2/:2\\ \\y=1\\ \\\begin{cases}x=2 \\y=1\end{cases}$

$3.)\\ \\\begin{cases} 5x + 4y = 12/*7\\ 7x - 6y = 40/*(-5) \end{cases}\\ \\\begin{cases} 35x + 28y = 84\\ -35x +30y = -200 \end{cases}\\---------- \\58y=-116/:58\\ \\y=-2$

$5x+4*(-2)=12\\ \\5x-8=12\\ \\5x=12+8\\ \\5x=20/:5\\ \\x=4\\ \\\begin{cases}x=4\\y=-2\end{cases}$

$4)\\ \\\begin{cases}5m + 2n = -8 /*4\\ 4m + 3n = 2/(-5) \end{cases}\\ \\ \begin{cases}20m + 8n = -32\\ -20m -15n = -10 \end{cases}\\------------ \\ -7n=-42/:(-7)\\ \\n=6$

$5m+2*6=-8\\5m+12=-8\\5m=-8-12\\5m=-20/:5\\ \\m=-4\\ \\\begin{cases}n=6\\m=-4\end{cases}$

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Give an example of a geometric formuka that xontainas pi

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