massie
massie
13-09-2016
Mathematics
contestada
how to factor out 2x^4 -8x^2
Respuesta :
jwo26
jwo26
17-09-2016
2x⁴ - 8x²
common factor is 2x²
therefore, you need to divide everything by
2x²
2x
⁴ ÷ 2x² = x²
8x² ÷
2x² = 4
2x² (x
²-4)
for x
²-4, you can also factor that using difference of squares
which is a
² - b² = (a+b)(a-b)
x²-4 = (x+2)(x-2)
final answer: 2x²
(x+2)(x-2)
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