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How do you solve $- 4 r^{2} = - 196$ $-4r^2=-196$ ?

1 Answer

Oct 17, 2015

$r = 7$ $r = 7$

Explanation:

$- 4 r^{2} = - 196$ $-4r^2 = - 196$

$\frac{- 4 r^{2}}{-4} = - \frac{196}{-4}$ $(-4r^2)/"-4" = -196/"-4"$

$r^{2} = 49$ $r^2 = 49$

$r = \sqrt{49}$ $r = sqrt(49)$

$r = 7$ $r = 7$

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