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dem82 [27]
3 years ago
6

Solve 2x2 + x − 4 = 0 using completing the square

Mathematics
1 answer:
Archy [21]3 years ago
6 0
2x^2+x-4=0
x^2+\dfrac12x-2=0
x^2+\dfrac12x+\dfrac1{16}-\dfrac{33}{16}=0
\left(x+\dfrac14\right)^2=\dfrac{33}{16}
x+\dfrac14=\pm\dfrac{\sqrt{33}}4
x=\dfrac{-1\pm\sqrt{33}}4
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