How do you solve $5 x^{2} - 245 = 0$ $5x^2 - 245 = 0$ ?

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How do you solve $5 x^{2} - 245 = 0$ $5x^2 - 245 = 0$ ?

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Answer 1 · 2016-02-25T03:39:40

$x = 7$ $x=7$ or $x = - 7$ $x=-7$

Explanation:

$5 x^{2} - 245 = 0$ $5x^2 - 245 = 0$
$5 x^{2} - 245 + 245 = 0 + 245$ $5x^2 - 245 + 245 = 0 + 245$ to isolate the variable term (x)
$5 x^{2} = 245$ $5x^2 = 245$
$\frac{5 x^{2}}{5} = \frac{245}{5}$ $(5x^2)/5 = 245/5$ to isolate the $x^{2}$ $x^2$
$x^{2} = 49$ $x^2 = 49$
$x = \sqrt{49}$ $x = sqrt49$ to eliminate the $x^{2}$ $x^2$
$x = 7$ $x=7$ or $x = - 7$ $x=-7$ the square can be plus or minus

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How do you solve $5 x^{2} - 245 = 0$ $5x^2 - 245 = 0$ ?

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How do you solve 5x^2 - 245 = 0 5x2−245=05x^2 - 245 = 0 ?

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How do you solve $5 x^{2} - 245 = 0$ $5x^2 - 245 = 0$ ?