coleenerazo
coleenerazo
14-04-2016
Mathematics
contestada
factor the expression 9x^2 -49
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penfila11Pen
penfila11Pen
14-04-2016
9x² - 49
3x × 3x = 9x²
-7 × 7 = -49
(3x - 7)(3x + 7)
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