Calculaţi:
2) a) 5 (x-3) - 4.(2x + 3) =
b) 3 (4x-3)-2.(5-7x)=
c) 4 (3x-4)-7.(2x + 3) =
d) √√6 (2√3x²-5√√2x+2√2)-2√3 (5√√3x² +8√√2x+2) =
e) 5√2 (2 √6 x²-3√6 x+8√√2)-9√√6 (√√2x² + 3√3x + 2√√6) =​