Question

Ma ajutati please,dau coroana❤❤
URGENT❤❤

Answer 1

Răspuns:

Nu se vede prea bine... sper ca am inteles ce scrie:

1) $x^2=144$ => $x_{1,2}=\pm \sqrt{144}=\pm 12$, adica $x_1=12,x_2=-12$.

2)$3x^2=300$ => $x^2=300:3=200$ => $x_{1,2}=\pm \sqrt{100}=\pm 10$

3)$10x^2=490$ => $x^2=490:10=49$ => $x_{1,2}=\pm \sqrt{49}=\pm 7$.

4)$4x^2=64$ => $x^2=64:4=16$ => $x_{1,2}=\pm 4$.

5)$4x^2-2=0$ => $4x^2=2$ => $x^2=\frac{2}{4}$ => $x_{1,2}=\pm \frac{\sqrt 2}{2}$.

6)$x(x+1)=x+2$ => $x^2+x=x+2$ => $x^2+x-x=2$ => $x^2=2$ => $x_{1,2}=\pm\sqrt{2}$.

Nu inteleg ce scrie la celelalte ex.