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x = -16 or x = 5

Solution:

Given polynomial:

To find the roots of the polynomial.

Split the middle term 11x.

11x = 16x - 5x

Take the x common in first 2 terms an -5 common in next 2 terms.

Take (x + 16) common in both terms.

x + 16 = 0  or  x - 5 = 0

x = -16       or   x = 5

Hence x = -16 or x = 5.

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.