Question

factor (9x² - 18x - 7)

Answer 1

Step-by-step explanation:

$\tt{}( {9x}^{2} - 18x - 7)$

$\tt{} {9x}^{2} + 21 - 3x - 7$

$\tt{}3x \times (3x + 7) -( 3x + 7)$

$\tt{}(3x + 7) \times( 3x - 1)$

Answer 2

$9x² - 18x - 7$

${9x}^{2} - 21x + 3x - 7$

$3x(x - 7) + 3(x - 7)$

$(3x + 3)(x - 7)$