Algebra 1b HELP
posted by Rylee
Consider the equation y=2x2+9x+1.
When x=−1, what is the value of y?
This question is a 'enter correct answer'. It doesn't give me any options. But, I did the math three times already, shouldn't
Y=10?

Steve
well, just plug in 1 for each x:
y = 2(1)^2 + 9(1) + 1
= 29+1
= 7
(1)^2 = (1)(1) = +1 
PsyDAG
Online "^" is used to indicate an exponent, e.g., x^2 = x squared.
A negative times a negative = a positive.
y = 2x^2 + 9x + 1 = 2(1) + (9) + 1 = ? 
Rylee
Steve
PsyDAGokay, so 2(1) + (9) + 1 = 6, right? 
Steve
correct. Sorry about by typo.

Rylee
that's fine, I appreciate the help. Thank you guys!
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