Question

$4x { }^{2} + 15 = 16x$
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Answer 1

Answer:

Rearrange

$4 {x}^{2} - 16x + 15 = 0$

Shreedharacharya Formula

$x = \frac{16 \pm \sqrt{ {16}^{2} - 4 \times4 \times 15} }{8} \\ \\ x = \frac{16 \pm \sqrt{16(16 - 15)} }{8} \\ \\ x = \frac{16 \pm4}{8} = \frac{5}{2} \: \: and \: \: \frac{3}{2}$