Baller347
Baller347
05-03-2015
Mathematics
Answered
4a^2+8a-20=0
By completing the square
Answer :
Hardy007
Hardy007
05-03-2015
I'm not sure but I think it is
a=−1±
6√
a≈1.44948974,−
3.44948974
Answer Link
Panoyin
Panoyin
06-03-2015
4a² + 8a - 20 = 0
a =
-8 +/- √(8² - 4(4)(-20))
2(4)
a =
-8 +/- √(64 + 320)
8
a =
-8 +/- √384
8
a =
-8 +/- 19.59591794
8
a =
-8 + 19.59591794
a =
-8 - 19.59591794
8 8
a =
11.59591794
a = -
27.59591794
8 8
a = 1.449489743 a = -3.443813782
Answer Link
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