20^2=400
So the root number is 400=20. Similarly, the root number is 169= 13.
So =0. 1*20+0.2* 13.
=2+2.6
=4.6
Root number 484- root number 12 and 1/4+ root number 20.25
484 = 22 2, 12 and one quarter = 49/4 = (7/2) 2,20.25 = 4.52.
so = 22-7/2+4.5 = 22-(3.5-4.5)= 22- 1 = 2 1。
Find the value of x suitable for the following types.
The square of x -36 =0
x^2=36=( 6)2
x= 6
25X squared =64
x^2=64/25=( 8/5)^2
x= 8/5
The square of (X-2) = 196
(x-2)^2=( 14)^2
x-2= 14
x=2 14
x 1=2+ 14= 16,x2=2- 14=- 12
The square of (2X+ 1) = the square of (-3)
(2x+ 1)^2=(-3)^2=9=( 3)^2
2x+ 1= 3
2x=- 1 3
x =(- 1 ^ 3)/2
x 1 =(- 1+3)/2 = 1 . x2 =(- 1-3)/2 =-2
Seeking cubic root
Cubic root number 3 and 3/8+ cube root number 0. 125
3 3/8 = 27/8 = (3/2) 3
0. 125=0.5^3
So =3/2+0.5
=2
Cubic radical 5- 27 times 10(-3+2 and 7/8)
Because two and seven eighths =23/8.
So in the third root number = 5- 10 *(3+23/8)/27.
=5- 10(- 1/8)/27
=5+ 10/2 16
= 1090/2 16
= 1090/(6^3)
So the original formula = (cube root number 1090)/6.
Find x
X^3+ 1=37/64
x^3=37/64- 1=-27/64=(-3/4)^3
x=-3/4
27(X- 1)^3+ 125=0
(x- 1)^3=- 125/27=(-5/3)^3
x- 1=-5/3
x=-5/3+ 1=-2/3