Question

Sendo A- X+5
B-x²+2x=1
C-2x²-4
D-x²-2x-1

determine

A.B

A.c

A.d

B.c

C.d

Answer 1

Determine
A.B
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(x+5).(x^2 + 2x - 1)
x^3 + 2x^2 - x + 5x^2 + 10x - 5
x^3 + 7x^2 + 10x - 5


A.C
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(x+5)(2x^2 - 4)
2x^3-4x+10x^2-20
2x^3+10x^2-4x-20

A.D
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(x-5)(-x^2 - 2x -1)
- x^3 - 2x^2 - x + 5x^2 - 10x + 5
-x^3 + 3x^2 - 11x - 5

B.C
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(x^2 + 2x - 1)(2x^2 - 4)
2x^4 - 4x^3 - 2x^2 + 4x^2 - 8x +4
2x^4 - 4x^3 + 2x^2 - 8x + 4

C.D
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(2x^2 - 4)(- x^2 - 2x - 1)
-2x^4 - 4x^3 - 2x^2 - 4x^2 + 8x + 4
- 2x^4 - 4x^3 - 6x^2 +8x +4