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vfiekz
[6]
3 years ago
10
-8x^2+4x+5=0 using quadratic formula
Mathematics
Answer
Comment
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1
answer:
daser333
[38]
3 years ago
6
0
So you want to solve for x?
It would be nice if this would easily factor:
(-4x + 5)(2x +1) = 0 This will not work!
So you need to use the quadratic formula:
a = -8, b = 4, c = 5
x = (-4 +/-
)/2(-8)
= (-4 +/-
)/-16
= (-4 +
)/-16
= 1/4 -
/4
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