Does someone know this?? Pls its due tmrw

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x

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.