4/5(x-1)+3/5x2

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Solution for 4/5(x-1)+3/5x2 equation: 


x in (-oo:+oo)

(4/5)*(x-1)+(3/5)*x^2 = 0

4/5*(x-1)+(3*x^2)/5 = 0

(4/5*5*(x-1))/5+(3*x^2)/5 = 0

4/5*5*(x-1)+3*x^2 = 0

3*x^2+4*x-4 = 0

3*x^2+4*x-4 = 0

3*x^2+4*x-4 = 0

DELTA = 4^2-(-4*3*4)

DELTA = 64

DELTA > 0

x = (64^(1/2)-4)/(2*3) or x = (-64^(1/2)-4)/(2*3)

x = 2/3 or x = -2

(x+2)*(x-2/3) = 0

((x+2)*(x-2/3))/5 = 0

((x+2)*(x-2/3))/5 = 0 // * 5

(x+2)*(x-2/3) = 0

( x+2 )

x+2 = 0 // - 2

x = -2

( x-2/3 )

x-2/3 = 0 // + 2/3

x = 2/3

x in { -2, 2/3 }

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