book Maths Puzzle Numerical Ability

Find the value of the following polynomial for the given values of the variable.

Value #1: x = -3
Value #2: x = -2

-x^2 - 5x -6 ?

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book Other Question

How many numbers from 100 to 5000 have all their digits in descending order. ex 743 how do you solve for x in {{{ X/(((1*10^-7)-x)*((4*10^-4)-x))=10^6) }}}