Question

3. In the expansion of (5x - 3)(x + 2)2
Find i) coefficient of x2 and x
ii) constant term

Answer 1

Answer:

=(5x-3)(x-2)²

=(5x-3)(x²+4-4x)

= 5x³+20x-20x²-3x²-12+12x

=5x³-23x²+32x-12

This is the polynomial. Hence coefficient of x²=-23 and coefficient of x=32

Answer 2

Answer:

constant will be 2x+x=9 because x is taken as 9