SOLUTION: Hi! I am stuck haven't done algebra in 35 years. I am evaluating an equation. 2x-4y to the 2nd power. x=3 and y= -2. I just forget how to start. Thanks very much

Algebra ->  Expressions -> SOLUTION: Hi! I am stuck haven't done algebra in 35 years. I am evaluating an equation. 2x-4y to the 2nd power. x=3 and y= -2. I just forget how to start. Thanks very much      Log On


   



Question 1055846: Hi! I am stuck haven't done algebra in 35 years. I am evaluating an equation.
2x-4y to the 2nd power. x=3 and y= -2. I just forget how to start. Thanks very much

Found 2 solutions by stanbon, MathTherapy:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
I am evaluating an equation.
2x-4y to the 2nd power. x=3 and y= -2.
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2x - 4y^2
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Substitute for x and y::
2*3 - 4*(-2)^2
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6 - 4*4
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= -10
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Cheers,
Stan H.
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Answer by MathTherapy(10555) About Me  (Show Source):
You can put this solution on YOUR website!

Hi! I am stuck haven't done algebra in 35 years. I am evaluating an equation.
2x-4y to the 2nd power. x=3 and y= -2. I just forget how to start. Thanks very much
First, and for your information, this is NOT an equation, but an expression, as it DOESN'T contain an equals sign. 
Second, is it: