BMI229
Create your own quadratic equation and demonstrate how it would be solved by graphing, factoring, the quadratic formula, and by completing the square.
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x2 + 6x + 8
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how it would be solved by graphing, factoring, the quadratic formula, and by completing the square.
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okay completeing teh square:
x2+6x +8=0
x2 +6x = -8 move the 8 over
use this formula (b/2)~2 so its (6/2)~2 oe (3)~2 = 9
x2 +6x +9 = -8 +9 add the 9 to both sides
(x+3)~2 = 1
\[(x+3)^{2} = 1\]
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then
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\[\sqrt{(x+3)^{2}} = \pm \sqrt{1}\] sqaure root both sides
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x+3 = + or - 1
-3 -3 subtract 3 from both sides
x=+1 -3 and -1-3 or -2, -4
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and thats the answer
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x= -2, -4 yes
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for completing the sqaure
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thank you you've been a big help
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great