x1=1.65; x2=2.2
Объяснение:
4(25x^2-80x+64)-65x+104+3=0
100x^2-320x+256-65x+104+3=0
100x^2-385x+363=0
D=(-385)^2+4*100*363=3025=>55
X1=(385+55)/200 = 11/5 =1.65
X2=(385-55)/200 = 33/20 = 2.2
5x-8=t
4t^2-13t+3=0
(4t-1)*(t-3)=0
4t-1=0. t-3=0
t1=-1/4. t2=3
5x-8=-1/4. 5x-8=3
x1=31/20. x2=11/5
x1=1.65; x2=2.2
Объяснение:
4(25x^2-80x+64)-65x+104+3=0
100x^2-320x+256-65x+104+3=0
100x^2-385x+363=0
D=(-385)^2+4*100*363=3025=>55
X1=(385+55)/200 = 11/5 =1.65
X2=(385-55)/200 = 33/20 = 2.2
5x-8=t
4t^2-13t+3=0
(4t-1)*(t-3)=0
4t-1=0. t-3=0
t1=-1/4. t2=3
5x-8=-1/4. 5x-8=3
x1=31/20. x2=11/5
Объяснение: