(x^2-6)^2=-3x^2+18 find one value of x that is a solution to the equation

Which of these triangle pairs can be mapped to each other using two reflections?

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.