Question

Se A=x²+1 e B=-2x²+x+2, Determine o valor de:

a)A+B

B) -5.B

C) -2A + 3B



f)-2A+3B=

Answer 1

A=x^2+1
B=-2x^2+x+2
a) A+B=
x^2+1-2x^2+x+2
-x^2+x+3
b) -5.B
-5.(-2x^2+x+2)
10x^2-5x-10
c) -2A+3B
-2.(x^2+1)+3.(-2x^2+x+2)
-2x^2-2-6x^2+3x+6
-2x^2-6x^2+3x+6-2
-8x^2+3x+4
f) -2A+3B
-2.(x^2+1)+3.(-2x^2+x+2)
-2x^2-2-6x^2+3x+6
-2x^2-6x^2+3x+6-2
-8x^2+3x+4