breahk12
07.11.2019 •
Mathematics
Solve x2 + 12x = –20 by completing the square.
add (startfraction b over 2 endfraction) squared to both sides of the equation. the value of (startfraction b over 2 endfraction) squared in this equation is .
write the left side of the equation as a binomial squared. the left side of the equation becomes ()2.
use the square root property of equality.
isolate the variable: x =
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Ответ:
(36) (x+6) (-10 or -2) i got this right on (ed)
Step-by-step explanation:
1 Add to both sides of the equation. The value of in this equation is 36.
2 Write the left side of the equation as a binomial squared. The left side of the equation becomes (x +6)2.
3 Use the square root property of equality.
4 Isolate the variable: x = -10 or -2
Ответ: