Question

fatore cada diferença de dois quadrado a seguir: a) a²-9 b)x⁴-1 c) 100-x². d)x²-36=

Answer 1

a)
= a² - 9
=  (a + 3).(a - 3)

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b)
= x⁴ - 1
= (x² + 1).(x² - 1)

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
c)
= 100 - x²  
= (10 + x).(10 - x)

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
d) 
= x² - 36 
= (x + 6).(x - 6)