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OpenStudy (anonymous):
Given the polynomial function below, find F(-5). F(x) = x2 - 2x - 7 A. -42 B. 8 C. 28 D. -22
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OpenStudy (alexandervonhumboldt2):
substitute -5 for x and solve
OpenStudy (alexandervonhumboldt2):
f(-5)=(-5)^2-2*(-5)-7=?
OpenStudy (anonymous):
is it D. -22
OpenStudy (alexandervonhumboldt2):
no
OpenStudy (alexandervonhumboldt2):
(-5)^2-2*(-5)-7=5^2+10-7=25+10-7=?
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OpenStudy (alexandervonhumboldt2):
-*-=+ (-)^2=+^2
OpenStudy (anonymous):
wait is it A. -42
OpenStudy (alexandervonhumboldt2):
no
OpenStudy (anonymous):
i horrible at algebra
OpenStudy (alexandervonhumboldt2):
well look: (-5)^2-2*(-5)-7=5^2+10-7=25+10-7=? can you simplify this?
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OpenStudy (anonymous):
C. 28
OpenStudy (alexandervonhumboldt2):
yes
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