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√5x²+8x-4√5 solve using quadratic equation​

Answer»

ANSWER:

\sqrt{5} x ^{2}  + 8x - 4 \sqrt{5}  \\  \\  \sqrt{5}x  ^{2}   +  4 \sqrt{5} x -  \sqrt{5}x \:  - 4 \sqrt{5}  \\  \\  \sqrt{5} x(x  +  4) -  \sqrt{5} (x  + 4) \\  \\ (x + 4)( \sqrt{5} x -  \sqrt{5} ) \\  \\ x =  - 4 \:  \: x =   \frac{ \sqrt{5} }{ \sqrt{5} }  = 1



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