Question

19. Find the coefficient of x²? in the product of (x-2)(1+2x).​

Answer 1

Answer:

2 is the coefficient of x^2

Step-by-step explanation:

(x-2)(1+2x)

x(1+2x)-2(1+2x)

x+2x^2-2-4x

2x^2-3x-2

so the coefficient of x^2 is 2

(^2 means x square)

Answer 2

(x-2)(1+2x)

=x(1+2x)-2(1+2x)

=x+2x²-2-4x

=2x²-3x-2

Coefficient of x² = 2

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