factor (9x² - 18x - 7)
Step-by-step explanation:
\(\tt{}( {9x}^{2} - 18x - 7)\)
\(\tt{} {9x}^{2} + 21 - 3x - 7\)
\(\tt{}3x \times (3x + 7) -( 3x + 7)\)
\(\tt{}(3x + 7) \times( 3x - 1)\)
\(9x² - 18x - 7\)
\({9x}^{2} - 21x + 3x - 7\)
\(3x(x - 7) + 3(x - 7)\)
\((3x + 3)(x - 7)\)
