Question

19. The co-efficient of x in the product of (x-1)(x-2x) is :​

Answer 1

Hello:)

(x-1)(1-2x)

=x-2x^2-1+2x

=2x^2+3x-1

the coefficient of x is 3

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Answer 2

(x-1)(x-2x)

x^2 - 2x^2 - x + 2x

-x^2+x = 0

or -(x^2-x) = -(0)

x^2-x = 0

therefore Coefficient of x is -1