Question

1) Fatore as expressões:
a) x2 - 81
b) x2 - 100
c) x2 + 15x +54
d) x2 - 14x + 40
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Answer 1

a) x² - 81 =. (x+9).(x-9)

b) x² - 100 = (x-10).(x+10)

c) x²+ 15x +50 = (x+5).(x+10)

d) x² - 14x + 40 = (x-4).(x-10)