Question 8200: Could someone please help me out with this one? I am suppose to evaluate this expression if a= -2, b = 5, c = -4, and d = 6
b^2 - 2bc+c^2 =
Here is what I have tried but it really looks wrong to me.
5^ - 2(5)(-4)+ -4^2 = and now I can't even figure out the answer to this. So I know there has to be a better way and I am hoping someone can show me.
Thanks
Answer by AnlytcPhil(1806)   (Show Source):
You can put this solution on YOUR website! Could someone please help me out with this one? I am suppose to
evaluate this expression if a= -2, b = 5, c = -4, and d = 6
`
b^2 - 2bc+c^2 =
`
Here is what I have tried but it really looks wrong to me.
5^ - 2(5)(-4)+ -4^2 = and now I can't even figure out the answer to this. So I know there has to be a better way and I am hoping someone can show me.
Thanks
`
b2 - 2bc + c2
`
Put (5) in place of b
`
(5)2 - 2(5)c + c2
`
Put (-4) in place of c
`
(5)2 - 2(5)(-4) + (-4)2
`
Replace (5)2 by 25
`
25 - 2(5)(-4) + (-4)2
`
Replace - 2(5)(-4) by + 40
`
25 + 40 + (-4)2
`
Replace + (-4)2 by + 16
`
25 + 40 + 16
`
Replace 25 + 40 by 65
`
65 + 16
`
Replace 65 + 16 by 81
`
81
`
Edwin
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