Question

complete the following to the solve equations 5x²+13+8=0 using formula​

Answer 1

Step-by-step explanation:

5x²+21=0

5x²= -21

5x² =-21/5

x²= -42

x*x=-42

2x = -42

x = - 42/2

x= -21

Answer 2

Answer:

-4.2

Step-by-step explanation:

5x^2 + 13 + 8 = 0

=> 5x^2 + 21 = 0

=> 5x^2 = -21

=> x^2 = -21/5 = -4.2