Question

alguem me ajuda?plmds super preciso​

Answer 1

Resposta:

b)

${x}^{2} = {15}^{2} + {12}^{2} \\ {x}^{2} = 225 + 144 \\ {x}^{2} = 369 \\ x = \sqrt{369} \\ x = 19.2$

d)

${(2 \sqrt{3} )}^{2} = {x}^{2} + {2}^{2} \\ 4 \times 3 = {x}^{2} + 4 \\ 12 - 4 = {x}^{2} \\ {x}^{2} = 8 \\ x = \sqrt{8} \\ x = 2 \sqrt{2}$