-5a(a⁴-6a²+3)=-5a*a⁴-5a*(-6a²)-5a*3=-5a*a⁴+5a*6a²-5a*3=5a^5+5a*6a²-5a*3=-5a^5+30a³-5a*3=-5a^5+30a³-15a
Ответ : -5a^5+30a³-15a
^ - степень
-2,59m + 4,59m = 5 + 6,9 - 13 - 6,9
2m = -8
m = -4
7^(n+2): 7^(n)=7^(n+2-n)=7^2=49. ОТВЕТ: 49.
<span>-x^2-10x-23=0 |* (-1)
x^2 +10x + 23 =0
D= b^2 - 4ac
D= 100 - 4*1*23 = 8
x1 = -10+ 2</span>√2 / 2 = -5+√2
x2= -5- √2