Calculation: 5 / 16 divided by 2 / 3 divided by 5 / 16 18 out of 35 divided by 0.6 divided by 6 out of 7

Calculation: 5 / 16 divided by 2 / 3 divided by 5 / 16 18 out of 35 divided by 0.6 divided by 6 out of 7

18/35÷0.6÷6/7
=18/35÷3/5÷6/7
=18 / 35 × 5 / 3 × 7 / 6 (approximately)
=1
5/16÷2/3÷5/16
=5 / 16 × 3 / 2 × 16 / 5 (approximately)
=3/2
25X square + 10xy + y square factorization
25x²+10xy+y²
=(5x)²+2×(5x)×y+y²
=(5x+y)²
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(5x + y) square
25X square + 10xy + y square
=(5x+y)²
(5x)^2+2*5x*y+y^2
=(5x + y) ^ 2 complete square formula
（5x+y）*（5x+y）
3 and 1 / 5 divided by 9 / 10 divided by 1 and 1 / 2
There's another question, 2 and 2 / 3 divided by 5 divided by 4 / 15
3 and 1 / 5 divided by 9 / 10 divided by 1 and 1 / 2 is 64 / 27
2 and 2 / 3 divided by 5 divided by 4 / 15 equals 2
Question 1 64 / 27, question 2
3 and 1 / 5 / 9 / 10 / 1 and 1 / 2
=16/5×10/9×2/3
=64/27
2 and 2 / 3 / 5 / 4 / 15
=8/3×1/5×15/4
=2
320/81
Two
16xyz + 25X square - 16y square - 4Z square, factorization
Wrong. This can't be broken down
16yz+25x²-16y²-4z²
=25x²-(16y²-16yz+4z²)
=(5x)²-(4y-2z)²
=(5x+4y-2z)(5x-4y+2z)
If 1 equals 5, 2 equals 25, 3 equals 225, 4 equals 4825, how much is 5
Because one equals five
So five is one
One
Solving equation x / X-2 + 1 / 4-x, square = 1
X / X-2 + 1 / 4-x square = 1
Multiply both sides of the equation by 4-x & sup2;, and you get
-x(2+x)+1=4-x²
-2x-x²+1=4-x²
-2x=3
The solution is x = - 3 / 2
Test: substitute x = - 3 / 2 into the original equation, left = right
So x = - 3 / 2 is the solution of the original equation
Multiply both sides by 4-x square to get: - 4-x + 1 = 4-x square. The simplified solution is (29 under 1 + radical) / 2 or (29 under 1-radical) / 2
Mathematical calculation problem: (- 1 and 1 / 2) - 1 and 1 / 4 + (- 2 and 1 / 2) - (- 3 and 3 / 4) - (- 1 and 1 / 4) + 4 =?
3 and 3 / 4 -- forget to adopt,
5 (X-2) - 125 = 0
5(x-2)^2-125=0
5(x-2)^2=125
(x-2)^2=25
x-2=±5
x=7; x=-3
On line, etc
Xiaoming's father deposits 20000 yuan in the bank for one year. When it matures, he withdraws 10000 yuan to speculate in stocks. The rest is deposited in the bank for one year. If the deposit interest rate remains unchanged, he gets 10980.48 yuan of principal and interest after it matures
Set up the solution of quadratic equation of one variable
Let the annual interest rate be X
10000(1+X)^2=10980.48
X is the interest rate
(2*x+1)*x+1=1.098048
The solution equation (x2-1) 2-5 (x2-1) + 4 = 0
Let x2-1 = T. then from the original equation, t2-5t + 4 = 0, that is, (t-1) (T-4) = 0, the solution is t = 1 or T = 4; ① when t = 1, x2-1 = 1, ∧ x2 = 2, ∧ x = ± 2; ② when t = 4, x2-1 = 4, ∧ x2 = 5, ∧ x = ± 5