How do you solve $v^{2} + 10 v - 21 = 0$ $v^2+ 10v - 21 = 0$ by completing the square?

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How do you solve $v^{2} + 10 v - 21 = 0$ $v^2+ 10v - 21 = 0$ by completing the square?

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Answer 1 · 2015-05-02T22:06:47

$y = v^{2} + 10 . v - 21 = 0$ $y = v^2 + 10.v - 21 = 0$

$y = v^{2} + 10 v + 25 - 25 - 21 = 0$ $y = v^2 + 10v + 25 - 25 - 21 = 0$

(v + 5)^2 = 46

$v + 5 = s q r 46 \to v = - 5 + s q r 46$ $v + 5 = sqr46 -> v = -5 + sqr46$
$v + 5 = - s q r 46 \to v = - 5 - s q r 46$ $v + 5 = -sqr46 -> v = -5 - sqr46$

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How do you solve $v^{2} + 10 v - 21 = 0$ $v^2+ 10v - 21 = 0$ by completing the square?

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How do you solve v2+10v−21=0v^2+ 10v - 21 = 0 by completing the square?

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How do you solve $v^{2} + 10 v - 21 = 0$ $v^2+ 10v - 21 = 0$ by completing the square?