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OpenStudy (anonymous):
Evaluate the expression for a = –1 and b = 5. (ab)^2
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OpenStudy (anonymous):
25
OpenStudy (anonymous):
its not -25?
OpenStudy (anonymous):
no, no square of a real number can be negative :)
OpenStudy (anonymous):
so 25?
Directrix (directrix):
(ab)^2 = (-1)*(5)] ^ 2 = [-5] ^ 2 = 25
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