<span>(6х-1)^2-(3-8x)(3+8x)=(10x+1)^2.
(6x-1)</span>²-(3-8x)(3+8x)-(10x+1)²=0
(6x-1)²+(8x-3)(8x+3)-(10x+1)²=0
(36x²-12x+1)+(8x-3)(8x+3)-(100x²+20x+1)=0
(36x²-12x+1)+(64x²-9)-(100x²+20x+1)=0
36x²-12x+1+64x²-9-100x²-20x-1=0
-32x-9=0
-32x=9
32x=-9
x=(-9)÷32
x=-9/32
<span>5(x+2)^2+(2x-1)^2-9(x+3)(x-3)=22
</span>5(x+2)²+(2x-1)²-9(x+3)(x-3)-22=0
5(x²+4x+4)+(4x²-4x+1)-9(x+3)(x-3)-22=0
(5x²+20x+20)+(4x²-4x+1)-(9x+1)-(9x+27)(x-3)-22=0
(5x²+20x+20)+(4x²-4x+1)-(9x²-27x+27x-81)-22=0
(5x²+20x+20)+(4x²-4x+1)-(9x²-81)-22=0
5x²+20x+20+4x²-4x+1-9x²+81-22=0
16x+80=0
16x=-80
x=(-80)÷16
x=-5
2x(x+5)=0
1)2x=0 x+5=0
x=0 x=-5
2)(x-8)(40x+8)=0
x-8=0 40x+8=0
x=8 40x=-8
x=-8/40
x=-1/5
<span>3)(x+2)(x+4)(x-6)=0
x+2=0 x+4=0 x-6=0
x=-2 x=-4 x=6</span>
98 / 2 = 49 четных.
99 - 49 = 41
-6x-4x=-5;-10x=-5;x=5
-x-6x=-7;-7x=-7;x=1
-7x-9x=-8;-16x=-8;x=0.5