caitlin03
caitlin03
18-02-2017
Mathematics
contestada
If y=x^2+2x
Find the value of y when x=-1
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SuperLegend
SuperLegend
18-02-2017
y=x^2+2x
Substitute -1 for x
y=-1^2+2(-1)
Square -1
y=1+2(-1)
Multiply 2 by -1
y=1+ (-2)
Subtract 2 from 1
Final Answer: y=-1
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