simplify:
(7a+2b)^2-(2a+7b)^2} / (4a+b)^2-(a+4b)^2
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1
49a^2+4b^2+28ab-4a^2-49b^2-28ab/16a^2+b^2+8ab-a^2-16b^2-8ab
=49a2+4b2+28ab+−4a2+−49b2+
−7
4
a3b+b2+8ab+−a2+−16b2+−8ab
=(
−7
4
a3b)+(49a2+−a2+−4a2)+(8ab+28ab+−8ab)+(−49b2+4b2+b2+−16b2)
=
−7
4
a3b+44a2+28ab+−60b2
Answer:
=
−7
4
a3b+44a2+28ab−60b2
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