quadratic eqn................................

Algebra
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solve quadratic equation x^2 x 4=0

Apr 2nd, 2015

for quadratic equation, it should be   

x^2 -4 = 0 

(x-4)(x+4) = 0       as we know that (a^2-b^2) = (a-b)(a+b)

x=4,-4


if its x^2+4 = 0 , 

x^2 = -4

then the solution of this equation are 

x = -2i,  2i

Apr 2nd, 2015

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Apr 2nd, 2015
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