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Solve the equation: `x^2+3=0` |
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Answer» (i) `x^2= -3` `x= +- sqrt3` `= +-isqrt3` (ii)` 2x^2+x+1=0` `D= b^2-4ac = 1-4*2*1 = -7` `x= (-b+-sqrt D)/(2a)` `=(-1+- sqrt7)/4` |
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