Mathematics: How do i put this in a quadratic formula

How do i put this in a quadratic formula - id3494851, brittanyjacob8

Ответ:

LeahAshe123

08.01.2022

$\bf ~~~~~~~~~~~~\textit{quadratic formula}
\\\\
\begin{array}{lcccl}
y=& 7 x^2& +2 x& +8\\
&\uparrow &\uparrow &\uparrow \\
&a&b&c
\end{array} 
\qquad \qquad 
x= \cfrac{ - b \pm \sqrt { b^2 -4 a c}}{2 a}
\\\\\\
x=\cfrac{-2\pm\sqrt{2^2~-~4(7)(8)}}{2(7)}\implies x=\cfrac{-2\pm\sqrt{4-224}}{14}
\\\\\\
x=\cfrac{-2\pm\sqrt{-220}}{14}\implies x=\cfrac{-2\pm\sqrt{2^2\cdot -55}}{14}$

$\bf x=\cfrac{-2\pm 2\sqrt{-55}}{14}\implies x=\cfrac{-1\pm 1\sqrt{-55}}{7}
\\\\\\
x=\cfrac{-1\pm \sqrt{55\cdot -1}}{7}\implies x=\cfrac{-1\pm \sqrt{55}\cdot \sqrt{-1}}{7}
\\\\\\
x=\cfrac{-1\pm \sqrt{55}~i}{7}\implies x=
\begin{cases}
-\frac{1}{7}+\frac{i\sqrt{55}}{7}\\\\
-\frac{1}{7}-\frac{i\sqrt{55}}{7}
\end{cases}$

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Ответ:

taylorbuck47

22.11.2021

Mathematics

For sake of convenience, you can multiply them by 10,

then it will become, 2040 * 46 =93840

Now, you should divide that by 100, = 93840/100 = 93.84

Did you like that idea??

If not, you can approach for basic one...but then you have to be careful about decimal..ok

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How do i put this in a quadratic formula

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