If a polynomial function f(x) has roots 3 and radical 7 what must also be a root of f(x)?

The answer is -√7

Step-by-step explanation:

∵ The polynomial has roots 3 and √7

∴ It must have root -√7 the conjugate of √7

∴ The roots of f(x) are 3 , √7 , -√7

   (one rational and two irrational conjugate to each other)

c. 65°

step-by-step explanation:

we are given a triangle with two known angles, 62° and 53°, while the third angle x is unknown and we are to find its value.

we know that the sum of angles in a triangle is equal to a total of 180 degrees. so we can write it as:

x + 62° + 53° = 180°

solving to find the value of x:

x = 180 - (62 + 53) = 65°

therefore, the value of x in this triangle is 65°.

it is b)

hope this : )

step-by-step explanation: