Answer:
1. x= 20/3 or 6.6666 repeating
2. x=3
3. a=39
Step-by-step explanation:
1. subtract 25 by 5 to get 20, then divide 20 by 3 to get x
2. divide 7 by 21 to get x
3. add 8 to 31 to get a equals 39
<h3>
<u>Answer</u><u>:</u></h3>
Perimeter → 25cm
Area → 25.5cm²
<h3><u>Explanation</u>:</h3>


6 times 8…………zzzzzzzzzzzzzzzzz
The actual roots of the function
are -9/2, 3/5 and 1.
Given function
.
Function is a relationship between two or more variables expressed in equal to form.
The roots of a polynomial function are the zeroes of the polynomial function. A polynomial function is a function that involves only non negative integer powers in an equation.
The polynomial function is given as:

factorize the above function

Now put the function f(x) equal to zero.
f(x)=(2x+9)(5x-3)(x-1)
split the function means put all the expressions equal to zero as under:
(2x+9)(5x-3)(x-1)=0
solve each for the value of x
x=-9/2,x=3/5,x=1
Hence the roots of the function
are which are also the values of x are -9/2,3/5,1.
Learn more about function at brainly.com/question/10439235
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20x^2+50 = -40x^2+110x [ Taking x as the unknown positive integer ]