1) ( a + x )^3 - a( a + x )^2 = ( a + x )^2*( a + x - a ) = x( a + x )^2 =
= x( a^2 + 2ax + x^2 ) = xa^2 + 2ax^2 + x^3
2) - x^2( 2a + x ) = - 2ax^2 - x^3
3) xa^2 + 2ax^2 + x^3 - 2ax^2 - x^3 = xa^2
4) xa^2 - a^2x = 0
64х^3+144х^2+108х+27=0
64х^3+48х^2+96х^2+72х+36х+27=0
16х^2*(4х+3)+24х*(4х+3)+9*(4х+3)=0
(4х+3)*(16х^2+24х+9)=0
(4х+3)*(4х+3)^2=0
(4х+3)^3=0
4х+3=0
4х=-3
х=-3/4=-0,75
<span>hштрих(x)=-3sin3x,
</span>hштрих(x)=2cos<span>(2x-П/3).</span>