Asked by Anonymous
Solve by completing the square.
1. 2x^2=5x+12
2. 5x^2+10x-7=0
1. 2x^2=5x+12
2. 5x^2+10x-7=0
Answers
Answered by
Damon
x^2 - (5/2)x = 6
x^2 - (5/2) x + 25/16 = 96/16 + 25/16
(x-5/4)^2 = 121/16
x-5/4 = +/- 11/4
x = (1/4)( 5 +/- 11)
x^2 - (5/2) x + 25/16 = 96/16 + 25/16
(x-5/4)^2 = 121/16
x-5/4 = +/- 11/4
x = (1/4)( 5 +/- 11)
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