Question

Factor completely 2x2 - 18. Prime 2(x2 - 9) 2(x + 3)(x - 3) 2(x + 3)(x + 3)

Answer 1

$2 x^{2} - 18= 2( x^{2} - 9)= 2(x + 3)(x - 3)$

Answer 2

2x² - 18
2(x²) - 2(9)
2(x² - 9)
2(x² + 3x - 3x - 9)
2x(x(x) + x(3) - 3(x) - 3(3))
2x(x(x + 3) - 3(x + 3))
2x(x - 3)(x + 3)