<span> x<3 3-x+7-x=10-2x
√(З-х)^2 + √(7-х)^2 </span> 3<x<7 x-3+7-x=4
x>7 x-3+x-7=2x-10
68(a-1)+32(a+6) раскрываем скобки
100a+124=810.7
X(x-y) - (x-y) = 2
(x-1)(x-y) = 2
2 = 1*2 = 2*1
1) x-1 = 1 => x = 2
x-y = 2 => y = 0 - не натуральное число
2) x-1 = 2 => x = 3
x-y = 1 => y = 1
Ответ: (3;1)
Ответ:
Объяснение:
2y*(6x+(1/4)*y)²-x*(8x+3y)²=2y*(36x²+3xy+y²/16)-x*(64x²+48xy+9y²)=
=72x²y+6xy²+y³/8-64x³-48x²y-9xy²=-64x³+24x²y-3xy²+y³/8=
=-(64x³-24x²y+3xy²-y³/8)=-((4x)³-3*16x²*(y/2)+3*4x*(y²/4)-(y/2)³)=
=-((4x)³-3*(4x)²*(y/2)+3*4x*(y/2)²-(y/2)³)=-(4x-(y/2))³=((y/2)-4x)³.
<span>(c-2)(c+3)-(c-1)²=c²+3c-2c-6-(c²-2c+1)=c²-3c+2c-6-c²+2c-1=c-7</span>