Factor out completely.
5x^2y^2+10x^2-7y^2-14

-explain how you got your answer

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

irrational, cannot