3 years ago

Solve the quadratic equation. 4x2 - 30 = 0

1 answer:

eduard3 years ago

3 0

False
because
(4)(2)−30?=0
−22≠0

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Limited time . 10 points

AfilCa [17]

Answer:

Therefore the value of x is

$x=1\pm\sqrt{19}i$

Step-by-step explanation:

Given:

$x^{2}+20=2x$ which is

$x^{2}-2x+20=0$

To Find:

x = ? using Quadratic Formula

Solution:

For a Quadratic Equation ax² + bx + c = 0 , Formula Method is given as

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

On Comparing with above we get

$a=1\\b=-2\\c=20$

Substituting a , b , c in Formula method we get

$x=\dfrac{-(-2)\pm\sqrt{(-2)^{2}-4(1)(20)}}{2\times 1}\\\\x=\dfrac{2\pm\sqrt{-76}}{2}\\\\x=\dfrac{2\pm2\sqrt{19}i}{2}\\Dividing\ by\ 2\ we\ get\\\\x=1 \pm\sqrt{19}i$

Therefore the value of x is

$x=1\pm\sqrt{19}i$

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noname [10]

Y = 2x - 8 is perpendicular to 6x+12y=24 and passes through (4,0)

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3 years ago

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Nikolay [14]

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(9x2 + 8x) – (2x2 + 3x)

Arte-miy333 [17]

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Step-by-step explanation:

(18+8x) - (4+3x)

18+8x-4-3x

14+5x

7 0

4 years ago

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