Представьте в виде многочлена 2. 5а2(4а3-а2+1) 3. (1-х)(2у +х) 4. (5с – 4)2
5a^2(4a^3-a^2+1)= =5a^2*4a^3-5a^2*a^2+5a^2= =20a^5-5a^4+5a^2 ==================== (1-x)(2y+x)= =2y+x-x*2y-x*x= =2y+x-2xy-x^2 ===================== (5c-4)^2= =(5x)^2-2*5c*4+4^2= =25c^2-40c+16