25x^2 +10x+1-10x=25x^2+1.
Y=4-x² y=2-x S-?
4-x²=2-x
x²-x-2=0 D=9 √D=3
x₁=-1 x₂=2
S=₋₁²(4-x²-2+x)dx=₋₁²(2+x-x²)dx=(2x+x²/2-x³/3) ₋₁|²=
=2*2+2²/2+2³/3-(2*(-1)+(-1)²/2-(-1)³/3)=4+2-8/3-(-2+1/2+1/3)=6-8/3-(-1,5+1/3)=
=6-8/3+1,5-1/3=7,5-3=4,5.
Ответ: S=4,5 кв. ед.
V1/V2 = k^3 = (3/4)^3 => V2= V1/k^3 => V(конуса)=270/(3*4)^3=640(мл)
Ответ:640 мл.
<span>(x+1)(x+1)=x^2+2x+1
</span><span>(x-1)(x+y-3)=x^2+xy-3x-x-y+3
</span><span>(x+2)(x-z)=x^2-xz+2x-2z
</span><span>(m+2)(n-p)=mn-mp+2n-2p
</span><span>(m-1)(m+n-2)=m^2+mn-2m-m-n+2</span>