The given expression is :

Factorize the expression :

Find the pair of number such that : the product of two numbers are equal = (-10)
and thier summation is equal to 3
i.e. 5 x ( -2) = -10 and 5 + (-2) = 3
So,

Take x common from the first two terms and (-2) from last two terms :

Now equate each factor with zero :

Answer : C) x = -5, 2