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OpenStudy (anonymous):
solve the equation (x+4)(x-6)=21
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OpenStudy (bahrom7893):
multiply it out and move everything to one side, then use the quadratic equation.
OpenStudy (imtant):
x^2-6x+4x-24=21 then bring 21 to the left, x^2-2x-24-21=0 x^2-2x-45=0 and factorize it,to get x..
OpenStudy (anonymous):
FOIL then bring 21 over then factor right?
OpenStudy (imtant):
ya..there will be two x values..
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