Coefficient of x in -9 x y2z is
a) 9yz b) -9yz c) 9y2z d) -9y2z
please say the right answer

Given:

The expression is

To find:

The coefficient of x in the given expression.

Solution:

Coefficient of a variable is the product of a number and other variables multiplying the variable in an algebraic expression.

In the given expression the number and variables other than x are -9, y² and z.

So, coefficient of x is

Therefore, the correct option is (d).

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680