exam Maths Puzzle Numerical Ability

i want to solve this problems but i cant because i dont no thank for help

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exam Other Question

solve algebraically for all valus of x in the interval 0 degress is less than/equal to X which is less than/equal to 360 degrees, that satisfy the equation cos2x= -3sinx-1 Please Help!!!

Solve...
1. -9(x-3)^2=-7
2. (x+4^2=3
3. 5(x-2)^2=3

Thanks In advance!!!