**Weegy:** r^2 + 12r + 27 = r^2 + 9r + 3r + 3*9 = (r + 9)(r + 3)

**User:** Solve each quadratic equation. Show your work.
(2x – 1)(x + 7) = 0

**Weegy:** (2x - 1)(x + 7) = 0; 2x - 1 = 0; 2x = 1; x = 1/2; x + 7 = 0; x = -7; the quadratic equation 2x^2 + 13x - 7 = 0 has a solution set of {-7 or 1/2}.

**User:** Solve each quadratic equation. Show your work. x2 + 3x = 10

**Weegy:** x^2 + 3x = 10 x^2 + 3x - 10 = 0 (x - 2)(x + 5) = 0 x - 2 = 0 or x + 5 = 0 x = 2 or x = -5

**User:** 4x2 = 100

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