Question

If x = -3 ,solution of the equation 2x 2 + 5x + 3 =0 ?

Answer 1

if x=-3 then,
2(-3)2+5(-3)+3=0
2*9+(-15)+3=0
18-15+3=0
6

Answer 2

X = -3

f(x) = 2x^2+5x+3=0

f(-3) = 2(-3)^2+5(-3)+3

= 18-15+3

= 6