what number is this one of my factors are 4 when you pair me up with 32 we have an LCM of 32 i am greater than 4 and smaller than 15

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Ответ:

shady1095

02.11.2020

Mathematics

Option C is correct.

Step-by-step explanation:

Given Quadratic Equation, 2x² = 4x - 7

We have to find value of x using quadratic formula.

Consider,

2x² = 4x - 7

2x² - 4x + 7 = 0

using Quadratic Formula

we get,

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

$x=\frac{-(-4)\pm\sqrt{(-4)^2-4(2)(7)}}{2\times2}$

$x=\frac{4\pm\sqrt{16-56}}{4}$

$x=\frac{4\pm\sqrt{-40}}{4}$

$x=\frac{4\pm\sqrt{40}\times\sqrt{-1}}{4}$

$x=\frac{4\pm\sqrt{40}i}{4}$

$x=\frac{4\pm4\sqrt{10}i}{4}$

$x=1\pm\sqrt{10}i$

Therefore, Option C is correct.

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