Question

помогите номер 1:::)))

Answer 1

а)
p1(x)+p2(x) = 4x²-5x+1+3x²+7x-8 = 7x²+2x-7
p1(x)-p2(x) = 4x²-5x+1-3x²-7x+8 = x²-12x+9

б)
p1(x)+p2(x) = x²-x³+5x+13+2x³+5x²-8x+12 = x³+6x²-3x+25
p1(x)-p2(x) = x²-x³+5x+13-2x³-5x²+8x-12 = -3x³-4x²+13x+1