Question

Calcule os valores de x:
a) x² - 1 = 63
b) x² + 2=27​

Answer 1

a)8² - 1 = 63 (8 x 8= 64) (64-1=63)
b) 5² + 2= 27 (5 x 5= 25) (25+2=27)

Answer 2

Resposta:

${x}^{2} - 1 = 63 \\ {x}^{2} = 63 + 1 \\ {x}^{2} = 64 \\ x = \sqrt{64 } \\ x = 8 \\ \\ {x}^{2} + 2 = 27 \\ {x}^{2} = 27 - 2 \\ {x}^{2} = 25 \\ x = \sqrt{25} \\ x = 5$