Answer:
C and D
Step-by-step explanation:
The quadratic formula is
x= (-b±√b²-4ac)/2a
The formula uses the numerical coefficients in the quadratic equation.
The general quadratic equation is ax²+bx+c where a, b and c are the numerical coefficients
So, lets try and see;
A.

But due to the fact that in this equation you have x⁴, the equation is not a quadratic equation thus can not be solved using this formula
B

C

D.

From the checking above, the equations will be C and D
Answer:
30, 30, 120
Step-by-step explanation:
Answer:
its the first one
Step-by-step explanation:
The opposite of this problem is -1
Answer:
Don't know because there is only 1 number there is no another . please write answer in comment