Question

Resolva as equações
a) X2+3=12
b)2y elevado a 2 - 5=11

Answer 1

Resposta:

a)

${x}^{2} + 3 = 12 \\ {x}^{2} = 12 - 3 \\ {x}^{2} = 9 \\ x = \sqrt{9 } \\ x = 3$

b)

$2 {y}^{2} - 5 = 11 \\ 2 {y}^{2} = 11 + 5 \\ 2 {y}^{2} = 16 \\ {y}^{2} = \frac{16}{2} \\ {y}^{2} = 8 \\ y = \sqrt{8} \\ y = 2.8$