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Mathematics 11 Online
OpenStudy (anonymous):

simplify (5x - 7y + 8z) - (-2x + 3y -z)

OpenStudy (skullpatrol):

Any ideas?

OpenStudy (skullpatrol):

Subtracting polynomials is like subtracting real numbers. To subtract a real number you add the opposite of that number. To subtract polynomials you add the opposite of each term of that polynomial and then simplify.

OpenStudy (neer2890):

5x-7y+8z+2x-3y+z =5x+2x-7y-3y+8z+z now add x,y and z terms

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