Factorise.4x² - 16x -9 – InterviewSolution

1.

Factorise.4x² - 16x -9

Answer»

$4 {x}^{2} - 16x - 9 = 0$

$4 {x}^{2} - 18x + 2x - 9 = 0$

$2x(2x - 9) + 1(2x - 9) = 0$

$(2x - 9)(2x + 1)$

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