Question

(2x+1)^2=27???????????

Answer 1

Explicație pas cu pas:

${(2x + 1)}^{2} = 27$

${(2x + 1)}^{2} = {(3 \sqrt{3} )}^{2}$

$|2x + 1| = 3 \sqrt{3}$

$2x + 1 = - 3 \sqrt{3} \iff 2x = - 3 \sqrt{3} - 1 \\ \implies x = - \dfrac{3 \sqrt{3} + 1}{2}$

$2x + 1 = 3 \sqrt{3} \iff 2x = 3 \sqrt{3} - 1 \\ \implies x = \dfrac{3 \sqrt{3} - 1}{2}$