Question

${4x}^{2} + 9= 12x$
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Answer 1

$4x {}^{2} + 9 = 12x$

$4x {}^{2} + 9 = 12x = 0$

$4x {}^{2} - 12x + 9 = 0$

$(2x - 3 ){}^{2} = 0$

$2x - 3 = 0$

$2x = 0$

$2x = 3$

$x = \frac{3}{2}$