3 years ago

Factor completely: x^2-81

Mathematics

1 answer:

mina [271]3 years ago

3 0

I'm not sure if this is correct but (x + 9) • (x - 9)

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ILL GIVE YOU BRAINLIST !!! HAVE TO GET IT RIGHT !!<br><br> Evaluate the expressions

Leokris [45]

Answer:

-32/3

Step-by-step explanation:

-10 2/3 , -10.6

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2 years ago

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What is the value of the equation -2/3x + 9 = 4/3 x -3?

MArishka [77]

Answer:

x = 6

Step-by-step explanation:

$\frac{-2}{3}x+9=\frac{4}{3}x-3\\\\\frac{-2}{3}x-\frac{4}{3}=-3-9\\\\\frac{-2-4}{3}x= - 12\\\\\frac{-6}{3}x = -12\\\\ -2x -12\\\\x = \frac{-12}{-2}\\\\x = 6$

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2 years ago

A new skateboard cost $150. You have a 30% off coupon. How much money did you save with your coupon?

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Take 150 and multiply 30%==0.30. 150* .30. =45.00 off answer is 105.00

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3 years ago

Finding the inverse of the function x^3+3x+1 is beyond the scope of this course. Nevertheless, you should be able to use your kn

slega [8]

Step-by-step explanation:

${x}^{3} + 3x + 1 = 1 = = = > \\ {x}^{3} + 3x = 0 = = = > \\ x({x}^{2} + 3) = 0 \\ x = 0 \: or \\ {x}^{2} + 3 = 0 = = = > \\ {x}^{2} = - 3 = = = > x 1= \sqrt{ - 3} \: or \: i \sqrt{3} \\ x2 = - \sqrt{ - 3} = = = > x2 = - i \sqrt{3}$

${x}^{3} + 3x + 1 = 5 = = = > \\ {x}^{3} + 3x - 4 = = = > \\ (x - 1)( {x}^{2} + x + 4) = 0 = = = > \\ x - 1 = 0 = = > x1 = 1 \\ {x}^{2} + x + 4 = 0 = = = > \\ x2 = - 1 + i \sqrt{3} \\ x3 = - 1 - i \sqrt{3}$

${x}^{3} + 3x + 1 = 3 = = = > \\{ x}^{3} + 3x - 2 = 0 = = = > x = 0.6$

4 0

1 year ago

Solve for the equation 2x+9=3x

Molodets [167]

Answer:

x=9

Step-by-step explanation:

4 0

3 years ago

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