Question

cat este x ,daca:
x la puterea 2 + 3 la puterea 4 = 15 la puterea 2

Answer 1

3 la puterea 4=81
15 la puterea 2=225
${x}^{2} + 81 = 225$
${x}^{2} = 225 - 81$
${x}^{2} = 144$
$x = \sqrt{144}$
x=12 sau x=-12

Answer 2

x²+3⁴=15²

x²+81=225

x²=225-81

x²=144

x=12