Mathematics, 13.07.2020 23:01, phil820

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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Solve x2 + 12x = –20 by completing the square. Add (StartFraction b Over 2 EndFraction) squared to b...