1.х⁴*х=x⁽⁴⁺¹)=x⁵<span>
у</span>⁶/у²=y⁽⁶⁻²⁾=y⁴<span>
(-2с</span>⁶)⁴=-2⁴c⁽⁶ˣ⁴⁾=16c²⁴
2. х³+ 4х²-х-4=(x³-x)+(4x²-4)=x(x²-1)+4(x²-1)=(x+4)(x²-1)<span>
а</span>³-3аb-2а²b + 6b²=a(a²-3b)-2b(a²-3b)=(a-2b)(a²-3b)
3. (3а-2b)²=9a²-12ab+4b²<span>
(2х+3у)</span>²=4x²+10xy+9y²<span>
(2а-3)(3+2а)=6a+4a</span>²-9-6a=4a²-9<span>
(с+5р)(с-5р)=c</span>²-5cp+5cp-25p²=c²-25p²
4. <span>4х</span>²<span>-9=(2x)</span>²-3²=(2x+3)(2x-3)<span>
16а</span>⁴<span>-81=(4x</span>²)²-9²=(4x²+9)(4x²-9)=((2x+3)²-12x)((2x-3)²+12x)<span>
4а</span>²<span>+12аb+9b</span>²=(2a+3b)²<span>
36х</span>²<span>-12ху+у</span>²=(6x-y)²
Это в каком классе проходят ?
A=5k+4
b=5n+3
a*b=(5k+4)(5n+3)=25kn+20n+15k+12=5(5kn+4n+3k+2)+2
-2x^2-5x-2=0 *(-1)
2x^2+5x+2=0
D=25-16=9
x1=(-5-3)/4=-8/4=-2
x2=(-5+3)/4=-2/4=-0.5