Solve by completing the square. Show all work you use to arrive at your answer.
x² + 6x = 81

x = - 3 ± 3

Step-by-step explanation:

x² + 6x = 81

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(3)x + 9 = 81 + 9

(x + 3)² = 90 ( take square root of both sides )

x + 3 = ± = ± 3 ( subtract 3 from both sides )

x = - 3 ± 3 , then

x = - 3 - 3 , x = - 3 + 3

false

step-by-step explanation:

false.   two legs of the trapezoid would be congruent, but the other two would not.   were all the legs congruent, then we'd have a square; were the 2 shorter sides congruent and the 2 longer sides also congruent, we'd have a rectangle.