(x-7)(x+y) + (y-z)(y+z) +(2-x)(z+x) is equal to
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Answer:
-5x+xy -6y -xz
Step-by-step explanation:
(x-7)*(x+y) + (y+z) +(2-x)*(z+x)
2x +xy -7x-7y + y + z +2z +2x -xz -2x
2x +xy + y +z +2z +2x -7x-7y -xz -2x
4x +xy +y +3z -9x-7y -xz
4x-9x +xy +y -7y -xz
-5x+xy -6y -xz
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