Question

x²-11x+5=0
calculati x₁+x₂ x₁*x₂ x²₁+x₂² x³₁+x₂ va rog dau corinita marchez cel mai bun dar ajutati-ma please dau nota

Answer 1

utilizezi relatiile lui Viette
$x_{1}+ x_{2}=11 \\ x_{1}* x_{2}= 5 \\ x_{1} ^{2} + x_{2} ^{2}=( x_{1}+ x_{2})^2-2 x_{1}* x_{2}=121-2*5=111 \\ x_{1} ^{3}+ x_{2} ^{3} =( x_{1} + x_{2})^3-3 x_{1}* x_{2}( x_{1}+ x_{2})=11^3-3*5*11= 1166$