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3 years ago

If f(x) = x2 + 2x – 10, what is f(-2)?

Mathematics

1 answer:

Vera_Pavlovna [14]3 years ago

4 0

Answer:

The answer is -18

Step-by-step explanation:

Actually if the x2 is supposed to be x^2 then it's -10

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Step-by-step explanation:

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3 years ago

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2 years ago

Solve for x. 2x² +21x-61 = (x+7)² Please

Ymorist [56]

Answer:

$x = \frac{-7 +\sqrt{489} }{2}$

$x = \frac{-7 - \sqrt{489} }{2}$

Step-by-step explanation:

2x² +21x-61 = (x+7)²

expand

2x² + 21x - 61 = x² + 14x +49

move everything to one side

x² + 7x - 12 = 0

use quadratic formula

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

plug in the values

$x = \frac{-7 +- \sqrt{7^{2}-4(1)(-110) } }{2(1)}$

solve

$x = \frac{-7 +- \sqrt{49-4(1)(-110) } }{2}$

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$x = \frac{-7 +- \sqrt{489} }{2}$

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2 years ago

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I am timed here! Please help! Answer only if you know the question. Else please don't.

Anarel [89]

Answer: 3

Step-by-step explanation: [ 3.6 ] represents the greatest integer function [ x ]

If x is an integer use that integer

If x is not an integer use the next smaller integer

[ 3.6 ] is not an integer, hence

[ 3.6 ] = 3

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2 years ago

How do I solve 24(x-1) = -6(4-x)+18

podryga [215]

So the right answer is 1.

Look at the attached picture

Hope it will help you...

Good luck on your assignment

~pragya

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3 years ago

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