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Mathematics 11 Online
OpenStudy (anonymous):

solve the quadratic equation z^2-2^z-8=0 by factoring

OpenStudy (anonymous):

do you mean 2z instead of 2^z?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

ok then we want two numbers that multiply to -8 and add to -2. -4 and 2 work: (z-4)(z+2)=0 z=4,-2

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