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4 years ago

Solve this using square roots and show your work please 4x^2-256=0

Mathematics

1 answer:

mamaluj [8]4 years ago

5 0

Answer:

x = ± 8

Step-by-step explanation:

Given

4x² - 256 = 0 ( add 256 to both sides )

4x² = 256 ( divide both sides by 4 )

x² = 64 ( take the square root of both sides )

x = ± $\sqrt{64}$ = ± 8

Solutions are x = - 8, x = 8

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4 years ago

The graph of the equation $x + 2y + 3 = 0$ is perpendicular to the graph of the equation $ax + 2y + 3 = 0$. What is the value of

insens350 [35]

Answer:

a = -4.

Step-by-step explanation:

If the are perpendicular then the slope of one graph will be - 1 / slope of the other.

Convert each equation to slope-intercept form:

x + 2y + 3 = 0

2y = = -x - 3

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So the slope of the line perpendicular to this will be - 1 / (-1/2) = 2.

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3 years ago