The density of pest population at which control

If x =7+4√3. then find the value of x +1/ x

If x + y + z = 10 and x² + y² + z² = 36, then what is the value of x y + y z + z x?

when x =4 and y =-6 then find the value of 27x³ +58x²y +31xy² +8y³?

[a/(2a²  + 5a + 2)] = 1/6 , then find the value of (a+1)/a ?

If x + y + z = 20, x² + Y² + z² = 160 and x z = y², then find the value of x z?

What is the simplified form of the expression?

(1 + x) (1 + x²) (1 + x⁴) (1 + x⁸) (1 – x)?

A.(1-x⁴⁰)

If (x² + 1)/x = 3, what is the value of (x¹² + 1)/x ⁶ ?

x = 7 - 4√3 then the value of x³+1/x³ is equal to?