4x²-7x-2=0 помогииите

Question

4x²-7x-2=0 помогииите

Answer 1

D = 49 + 32 = 81 ;√ D = 9 
X1 = ( 7 + 9 ) : 8 = 2 
X2 = ( 7 - 9) : 2 = - 1 
Ответ 2 и ( - 1 )

Comments

спасиибо

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