Question

Answer 1

a: \(=x^2+10x+25-x^2+6x-9=16x+16=160+16=176\)

b: \(=x^2+2x+1-x^2+2x-1=4x=-20\)

c: \(=x^3-3x^2+3x-1+x^3-6x^2+12x-8\)

\(=2x^3-9x^2+15x-9\)

\(=2\cdot3^3-9\cdot9+15\cdot3-9=9\)

Answer 2

`a, A = x^2 + 10x + 25 - x^2 + 6x - 9`

`= 16x + 16 = 16(x+1) = 11 . 16 = 176`

`b, = x^2 + 2x + 1 - x^2 + 2x - 1`

`= 4x = 4 . -5 = -20`

`c, = 2^3 + 1^3`

`= 9`.

`d, = (-3)^3 - (-2)^3`

`= -27 + 8`

`= -19`