X^2+5x-6=0 ///////help

Question

X^2+5x-6=0
///////help

Comments

x₁ =1 корень ⇒x₂ = (-6) /1 = -6 (Виет ) x²+5x-6=0 ⇔x²- x +6x -6=0⇔ x(x-1)- +6(x -1)=0 ⇔(x-1)(x+6) =0

Answer 1

D = 5² - 4*1*(-6) = 25 + 24 = 49, D > 0,

x1 = (-5 + 7) / 2 = 2/2 = 1.
x2 = (-5 - 7) / 2 = -12 / 2 = -6.

Comments

thanks

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ne za chto.