Question

20 pontos !!! dados os polinômios p(x)=x²-4x=3,q(x)=-2x+4 e r(x)=2x³-4x+5 calcule: a)p(x)+r(x) b)q(x)-p(x) c)-4.r(x) d)p(x).q(x) e) [q(x)]²

Answer 1

a-)(x^2-4x-3)+(2x^3-4x+5)=>2x^3+x^2+2
b-(-2x+4)-(2x^3-4x+5)=>-2x^3+2x-1
c-)-4*(2x^3-4x+5)=-8x^3+16x-20=>-2x^3+4x-5
d-)(x^2-4x-3)*(-2x+4)
-2x^3+4x^2+8x^2-16x+6x-12
-2x^3+12x^2-10x-12=>-x^3+6x^2-5x-6
e-)(-2x+4)^2=>(-2x+4)(-2x+4)=4x^2-4x-4x+16
4x^2-8x+16=>x^2-2x+4