SOLUTION: I am not sure of how to calculate thw right answer for these two equations/ 1) S = -10(2)^2+21(2)+7. 2) S = -10(4)^2+21(4)+7.

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Question 270847: I am not sure of how to calculate thw right answer for these two equations/
1) S = -10(2)^2+21(2)+7.
2) S = -10(4)^2+21(4)+7.
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
1) S = -10(2)^2+21(2)+7.
2) S = -10(4)^2+21(4)+7.
i think u have these parenthesies out of order if x=2 and x=4 for 2nd problem they should look like this:
S=-10%282%5E2%29%2B21%282%29%2B7 now simple order of opperations:() then * then +
S=-10%284%29%2B21%282%29%2B7
S=-40%2B42%2B7
S=9
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S=-10%284%5E2%29%2B21%284%29%2B7
S=-10%2816%29%2B21%284%29%2B7
S=-160%2B84%2B7
S=-69