(2 14/38 -(-2 5/12))(-4/15)+9 3/4 : (-13)= (2 14/38 + 2 5/12)(-4/15)+39/4 : (-13) = ((2+2)+(14/38 + 5/12))(-4/15)-39/4 * 1/13 = (4 + 179/228)(-4/15)-3/4= 4 179/228*(-4/15)-3/4= 1091/228*(-4/15)-3/4 = -1091/57 * 1/15 - 3/4 = -1091/855 - 3/4 = -6929/3420= -2 89/3420
Y`=2(x-7)(x+8)+1*(x-7)²=(x-7)*(2x+16+x-7)=(x-7)*(3x+11)=0
x=7 x=-3 2/3
+ _ +
---------------------(-3 2/3)----------------(7)---------------------
max
ymax=y(-11/3)=(-3 2/3-7)²(-3 2/3+8)+29=1024/9*13/3+29=
=(13312+783)/27=14095/27=522 1/27
(2d^2-k^5)^2=4d⁴-4d²k⁵+k¹⁰
Ответ: уравнение имеет 2 корня