Question

show that x=-2 is a solution of 2x²+4x-10=0​

Answer 1

Step-by-step explanation:

put x = -2 in the given polynomial and if LHS = RHS, then x = -2 is a solution

p(-2) = 2(-2)² + 4(-2) - 10

=> 8 - 8 - 10 => -10 ≠ 0

hence x = -2 is not a solution