Asked by hailie
another question I'd appreciate someone looking over is this one...
(-7y-4)+(-9y^2+5y+7)-(-5y^2-7y-4)
=14y^2+19y+7
is that right?
(-7y-4)+(-9y^2+5y+7)-(-5y^2-7y-4)
=14y^2+19y+7
is that right?
Answers
Answered by
Reiny
not quite
(-7y-4)+(-9y^2+5y+7)-(-5y^2-7y-4)
= -7y - 4 - 9y^2 + 5y + 7 + 5y^2 + 7y + 4
= -4y^2 + 5y + 7
(-7y-4)+(-9y^2+5y+7)-(-5y^2-7y-4)
= -7y - 4 - 9y^2 + 5y + 7 + 5y^2 + 7y + 4
= -4y^2 + 5y + 7
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