A=10a²+2b²-7a+6,B=a²+b²+5a+1=?A-B=?
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![A=10a²+2b²-7a+6,B=a²+b²+5a+1=?A-B=?](/uploads/image/z/5913835-43-5.jpg?t=A%3D10a%26%23178%3B%2B2b%26%23178%3B-7a%2B6%2CB%3Da%26%23178%3B%2Bb%26%23178%3B%2B5a%2B1%3D%3FA-B%3D%3F)
A=10a²+2b²-7a+6,B=a²+b²+5a+1=?A-B=?
A=10a²+2b²-7a+6,B=a²+b²+5a+1=?A-B=?
A=10a²+2b²-7a+6,B=a²+b²+5a+1=?A-B=?
A-B
=10a²+2b²-7a+6-(a²+b²+5a+1)
=10a²+2b²-7a+6-a²-b²-5a-1
=9a²+b²-12a+5
A-B=10a²+2b²-7a+6-(a²+b²+5a+1)=9a^2+b^2-12a+5