Question

exercitiile 1 , 2 ,3 . Dau coroanaaa !!! va rogg

Answer 1

3) 4x²=(6·4+1)/4
4x²=25/4
4·4x²=25
16x²=25
x²=25/16
x²=1,5625

2) a=8-2√7
b=8+2√7
Mg=√(ab)=√(8-2√7)(8+2√7)=√(64-28)=√36=6

1) =[(2√2/2-3√3/3)·√6]+(3/3√2-10/5√3)·(-√6)=
(√2-√3)·√6+[(3√2/6-10√3/15)·(-√6)]
=√12-√18+(√2/2-2√3/3)·(√6)
=2√3-3√2+[(3√2-4√3)/6·(-√6)]=
=2√3-3√2+(-3√12+4√18)/6
=2√3-3√2+(-6√3+12√2)/6
=(6·2√3-6·3√2-6√3+12√2)/6
=(12√3-18√2-6√3+12√2)/6
=(6√3-6√2)/6
=6(√3-√2)/6=√3-√2