srinidubai2019
srinidubai2019
26-02-2021
Mathematics
contestada
factorise the equation 9x^2 - 4
Respuesta :
devishri1977
devishri1977
01-03-2021
Answer:
Step-by-step explanation:
a² - b² = (a +b)(a - b)
9x² - 4 = (3x)² - 2²
= (3x + 2 )(3x - 2)
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