Question

se considera numerele :
$\sqrt{162} + \sqrt{242} + \sqrt{288} + \sqrt{98} + \sqrt{18}$
$(1-2x) ^{2}$
$(X+2) ^{3} -((X ^{2} +1)$

Answer 1

1)=√81*2+√121*2+√144*2+√49*2+√9*2=9√2+11√2+12√2+7√2+3√2=41√2

2)=1²-4x+4x²

3)=(x³+6x²+12x+8)-(x²+1)=x³+6x²+12x+8-x²-1=x³+5x²+12x+7

al treilea e incomplet, nu stiu cum sa-l descompun mai departe