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Объяснение:
(2-5x)(3+x)-(5x+2)(3-x)=6+2x-15x-5x²-15x+5x²-6+2x=-13x-13x=-26x
(5x-4)/2 -(2x+1)/3=-1/5 (x-29)
3(5x-4)/(3*2) -2(2x+1)/(2*3)=(29-x)/5
(15x-12-4x-2)/6=(29-x)/5
5(11x-14)=6(29-x)
55x-70=174-6x
55x+6x=174+70
61x=244
x=244/61=4
2(5+x)(x-5)-(3x-1)²+7x²=3
2(x²-25)-(9x²-6x+1)+7x²=3
2x²-50-9x²+6x-1+7x²=3
-7x²-51+6x+7x²=3
6x=51+3
x=54/6=9
2/3 y-3y²=0
y(2/3 -3y)=0
y1=0
2/3 -3y=0
3y=2/3
y=(2/3)/3
y2=2/9
x²+3x+2=0
D=9-8=1
x1=(-3-1)/2=-4/2=-2
x2=(-3+1)/2=-2/2=-1
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Объяснение:
Объяснение:
(2-5x)(3+x)-(5x+2)(3-x)=6+2x-15x-5x²-15x+5x²-6+2x=-13x-13x=-26x
(5x-4)/2 -(2x+1)/3=-1/5 (x-29)
3(5x-4)/(3*2) -2(2x+1)/(2*3)=(29-x)/5
(15x-12-4x-2)/6=(29-x)/5
5(11x-14)=6(29-x)
55x-70=174-6x
55x+6x=174+70
61x=244
x=244/61=4
2(5+x)(x-5)-(3x-1)²+7x²=3
2(x²-25)-(9x²-6x+1)+7x²=3
2x²-50-9x²+6x-1+7x²=3
-7x²-51+6x+7x²=3
6x=51+3
x=54/6=9
2/3 y-3y²=0
y(2/3 -3y)=0
y1=0
2/3 -3y=0
3y=2/3
y=(2/3)/3
y2=2/9
x²+3x+2=0
D=9-8=1
x1=(-3-1)/2=-4/2=-2
x2=(-3+1)/2=-2/2=-1