Question

D) {-0,25; 0,25

REPEDE VA ROG ​

Answer 1

Răspuns: $\boxed{\boxed{\bf x_{1} =+\dfrac{5}{2}~;~ x_{2} =- \dfrac{5}{2}}}$

Explicație pas cu pas:

Salutare!

$\bf -4x^{2} +25 = 0$

$\bf -4x^{2} =-25~~~~\bigg|:(-4)$

$\bf x^{2} =\dfrac{25}{4}$

$\bf x =\sqrt{\dfrac{25}{4}}$

$\bf x =\sqrt{\dfrac{5^{2} }{2^{2}}}$

$\bf x =\pm \dfrac{5}{2}$

$\boxed{\boxed{\bf x_{1} =+\dfrac{5}{2}~;~ x_{2} =- \dfrac{5}{2}}}$

==pav38==