Question

(x+10)²=11x+100
bhaskara ​

Answer 1

Resposta:

(x+10)² = (x+10) . (x+10) = x²+ 10x + 10x + 100 = x² + 20x +100

x² + 20x + 100 = 11x + 100

x² +20x - 11x + 100 - 100 = 0

x² + 9x + 0 = 0

️= b² - 4ac

️= 9² - 4.1.0

️= 81 - 0

️= 81

x= -9 ± (raiz quadrada) de 81 / 2.1

x= 9 ± 9 / 2

x1 = 9 + 9 / 2 = 18/2 = 9

x2 = 9-9 / 2 = 0/2 = 0