х(4 – х) = 0 х² + 5х = 0 х² + 4х + 4 = 0 4х² – 64 = 0 15х² – 3х = 7х² + 5х

х(4 – х) = 0
х² + 5х = 0
х² + 4х + 4 = 0
4х² – 64 = 0
15х² – 3х = 7х² + 5х

  • 1) x(4-x)=0

    x=0 x=4

    2) x^2+5x=0

    x(x+5)=0

    x=0 x=-5

    3) x^2+4x+4=0

    (x+2)^2=0

    x=-2

    4) 4*x^2-64=0

    4(x^2-16)=0

    4(x-4)(x+4)=0

    x=4 x=-4

    5) 15*x^2-3x=7*x^2+5x

    15*x^2-7*x^2-3x-8x=0

    8*x^2-11x=0

    x(8x-11)=0

    x=0 x=11/8

  • Х(4-х)=04-2х=02х=4х=2