Is x=-3, solution of the equation 2x²+5x+3=0.

No

Step-by-step explanation:

If x = - 3 is a solution to the equation, then the value of the equation should equal zero when x = - 3 is substituted into the left side, that is

2(- 3)² + 5(- 3) + 3

= 18 - 15 + 3

= 6 ≠ 0

Hence x = - 3 is not a solution of the equation

yes

step-by-step explanation:

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3