Question

Cât mai rapid! Dau coroana :-)

Answer 1

Răspuns:

a) x+√2=2√2⇒ x= 2√2-√2⇒x=√2

c) √3·x=1+2⇒√3·x=3⇒x=3/√3⇒x=√3

e) x+ √3·√12=√3·√27⇒ x +√3·2√3=√3·3√3⇒ x+ 6=9⇒x=3

g) 3√2·x+9=0⇒3√2·x= -9⇒ x= -9/3√2⇒ x=-3/√2⇒x= -3√2/2

Explicație pas cu pas:

Answer 2

$\it a)\ \ x+\sqrt2=\sqrt8 \Rightarrow x+\sqrt2=\sqrt{4\cdot2}\Rightarrow x+\sqrt2=2\sqrt2\Rightarrow x=\sqrt2\\ \\ b)\ \ \sqrt3\cdot x-2=1|_{+2}\Rightarrow \sqrt3\cdot x=3 \Rightarrow \sqrt3\cdot x=\sqrt3\cdot\sqrt3|_{:\sqrt3}\Rightarrow x=\sqrt3\\ \\ e)\ \ \dfrac{x}{\sqrt3}+\sqrt{12}=\sqrtr{27}|_{\cdot\sqrt3}\Rightarrow x+\sqrt{36}=\sqrt{81} \Rightarrow x+6=9\Rightarrow x=3\\ \\ g)\ \ \sqrt{18}\cdot x +9=0\Rightarrow 3\sqrt2\cdot x+9=0\Rightarrow 3\sqrt2\cdot x=-9|_{:3}\Rightarrow \\ \\\Rightarrow \sqrt2\cdot x=-3|_{\cdot\sqrt2}\Rightarrow 2x=-3\sqrt2|_{:2}\Rightarrow x=-\dfrac{3\sqrt2}{2}$