Question

Fatorar as expressões com coeficientes reais:

a) x² - 8x + 15 = 0

b) x² + x - 20 = 0



*P0R FAVOR me ajudem!!!!!!*


​

Answer 1

a) x² - 8x + 15 = 0

b/c= -8/15= -3-5/-3•-5 => (x-3).(x-5)

b) x² + x - 20 = 0

b/c= 1/-20= 5-4/5•-4 => (x+5).(x-4)