Solve the polynomial 20x² + 10x² - 5

Combine the like terms: 30x^2 - 5

(You cannot evaluate without an X value, or unless you set it equal to zero)

IF it is equal to zero, then this is the answer

x=0.408248, - 0.408248

But if this equation isn't set equal to zero, just simplify it to 30x^2 - 5