Qual o discriminante da equaçao?
-x²+2√5 -5=0
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![- x^{2} +2 \sqrt{5} -5=0 \\ \\ a=-1 \\ b=2 \sqrt{5} \\ c=-5 \\ \\ \triangle=b^2-4ac \\ \triangle=(2 \sqrt{5} )^2-4(-1)(-5) \\ \triangle=4(5)-20 \\ \triangle=20-20 \\ \triangle=0 - x^{2} +2 \sqrt{5} -5=0 \\ \\ a=-1 \\ b=2 \sqrt{5} \\ c=-5 \\ \\ \triangle=b^2-4ac \\ \triangle=(2 \sqrt{5} )^2-4(-1)(-5) \\ \triangle=4(5)-20 \\ \triangle=20-20 \\ \triangle=0](https://tex.z-dn.net/?f=-+x%5E%7B2%7D+%2B2+%5Csqrt%7B5%7D+-5%3D0+%5C%5C++%5C%5C+a%3D-1+%5C%5C+b%3D2+%5Csqrt%7B5%7D++%5C%5C+c%3D-5+%5C%5C++%5C%5C+%5Ctriangle%3Db%5E2-4ac+%5C%5C+%5Ctriangle%3D%282+%5Csqrt%7B5%7D+%29%5E2-4%28-1%29%28-5%29+%5C%5C+%5Ctriangle%3D4%285%29-20+%5C%5C+%5Ctriangle%3D20-20+%5C%5C+%5Ctriangle%3D0)
discriminante é delta =0
discriminante é delta =0
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