Question

based on the above image
find the value of x and y and angles a, b, c and d​

Answer 1

Answer:

$(x + 30) + (x - 30) = 180 \\ 2x = 180 \\ x = 90 \\ (x - 30) + (y + 20) = 180 \\ 90 - 30 + y + 20 = 180 \\ y = 100$

hope it helps you ✌️✅✅✅

Answer 2

Answer:

If -5+iα, -5+iβ (where α²≠β²; α, β∈ R and i²=-1) are roots of x³ + 15x² + c x + 860 = 0, c∈R, Then

(A) c=222

(B) all three roots are imaginary

(C) two roots are imaginary but not complex conjugate of each other

(D) -5+7i√3, -5-7i√3 are imaginary roots

Please give the solution with explanation