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OpenStudy (anonymous):
(7k-1)^2
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OpenStudy (shamil98):
(7k-1)^2 = (7k -1)(7k -1) Use FOIL to get your terms multiply everything in (7k-1) to (7k-1) 7k(7k)= 7k(-1)= -1(7k)= -1(-1)=
OpenStudy (shamil98):
then simplify by combining the like terms.
OpenStudy (anonymous):
ok how about (-3x)^2 (-2^4x^2)
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