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

-52

Step-by-step explanation:

Let’s find x and y

x=7 and y=3

so 7x2=14

3x22=66

14-66=-52