Объяснение:
а) x(5x-3)=3(2x-1 1/3)
5x²-3x=6x-3×4/3
5x²-3x=6x-4
5x²-3x-6x+4=0
5x²-9x+4=0
a=5 b=-9 c=4
D= 81-4×5×4=1
x1=(9-1)/2×5=8/10=4/5=0.8
x2=(9+1)/2×5=1
в) (3x-2)(3x+2)=4x(x-1)
9x²-4=4x²-4x
9x²-4x²+4x-4=0
5x²+4x-4=0
D=16-4×5×(-4)=16+80=96
д)
4m²+12m+9=m²-1
3m²+12m+10=0
D=144-4×3×10=24
ж)
4p²+12p+9-(p²-2p+1)=-8
4p²+12p+9-p²+2p-1+8=0
3p²+14p+16=0
D=196-4×3×16=4
x1=(-14-2)/6=-16/6=-8/3
x2=(-14+2)/6=-12/6=-2
Объяснение:
а) x(5x-3)=3(2x-1 1/3)
5x²-3x=6x-3×4/3
5x²-3x=6x-4
5x²-3x-6x+4=0
5x²-9x+4=0
a=5 b=-9 c=4
D= 81-4×5×4=1
x1=(9-1)/2×5=8/10=4/5=0.8
x2=(9+1)/2×5=1
в) (3x-2)(3x+2)=4x(x-1)
9x²-4=4x²-4x
9x²-4x²+4x-4=0
5x²+4x-4=0
D=16-4×5×(-4)=16+80=96
д)
4m²+12m+9=m²-1
3m²+12m+10=0
D=144-4×3×10=24
ж)
4p²+12p+9-(p²-2p+1)=-8
4p²+12p+9-p²+2p-1+8=0
3p²+14p+16=0
D=196-4×3×16=4
x1=(-14-2)/6=-16/6=-8/3
x2=(-14+2)/6=-12/6=-2