Question

196 -(4x+2) la puterea 2=0
​

Answer 1

Răspuns:

$\mathbf{ S =\left\{ - 4 ;3 \right\} }$

Explicație pas cu pas:

$\mathbf{196 - (4x + 2) {}^{2} = 0 }$

$\mathbf{ - (4x + 2) {}^{2} = - 196 }$

$\mathbf{(4x + 2) {}^{2} = 196}$

$\mathbf{4x + 2 = \pm14}$

$\mathbf{4 x + 2 = - 14 \: \Longrightarrow \: x = - 4}$

$\mathbf{4x + 2 = 14 \Longrightarrow \: x = 3}$

$\boxed{\mathbf{ S =\left\{ - 4 ;3 \right\}}}$

Bafta ! :)