Question

Fatore completamente as expressões:
A) 5x² - 5y²
B) 2a² - 18
C) x³ - xy²

Answer 1

A) 5(x²-y²) = 5(x-y)(x+y)
B) 2(a²-9) = 2(a-3)(a+3)
C) x(x²-y²) = x(x-y)(x+y)

Answer 2

a)
= 5x² - 5y²

= 5(x² - y²)

= 5.(x + y).(x - y)
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b)
= 2a² - 18

= 2(a² - 9)

= 2.(a + 3).(a - 3)
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c)
= x³ - xy²

= x(x² - y²)

= x.(x + y).(x - y)
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