Question

Calculati :
x+5+5(x-1)-4
3x(x-2)-2(x+5)
(x³)²:x²
x(x²-1)-3(x+1)+4(x-2)
(√3+√2)(√3-√2)
(√3+1)²-2√3

Answer 1

x+5+5(x-1)-4=
=x+5+5x-5-4=
=6x-4=
=2(x-2)

3x(x-2)-2(x+5)=
=3x²-6x-2x-10=
=3x²-8x-10

(x³)²:x²=x⁶:x²=x⁴

x(x²-1)-3(x+1)+4(x-2)=
=x³-x-3x-3+4x-8=
=x³-11

(√3+√2)(√3-√2)=3-2=1

(√3+1)²-2√3=3+1+2√3-2√3=4