Question

Rozwiąż równanie.

a) 5(x^2-6)=7x^2-80

b) x(x-2)=4(1-0,5x)

c) (x+6)^2-12x=0

d) (x-1)^2+(2X-1)^2=47-6x

e) x^2(x-2)=-2x(x+4)+8(x-1)

Answer 1

a)5x^2-30=7x^2-80,5x^2-7x^2=-80+30,-2x^2=-50/-2,x^2=25,x=V25,x=5----V-pierwiastek      b)x^2-2x=4-2x,x^2-2x+2x=4,x^2=4,x=V4,x=2             c)x^2+36-12x=0,Vx^2-12x=-36,-11x=-36/-11,x=3 3/11       d)x^2-1+4x2=47-6x,5x^2+6x=47+1,V5x+6x=48/6,V6x=8/V,6x=8/V/6,x=8/6V,x=4/3V      e)2x^2-2x^2=-2x^2-8x+8x-8,2x^2=-8/2,x^2=-4,Vx=-4/V,x=-4/V*V/V,x=-4V