1.(A+3)(A+3), 2.(B+4a)\Xb2, 3.2a(-8a+3), 4.(B+2)(B+4), 5.-2a(-B+3-2a), 6.(5b\Xb2+7a\Xb2)(-5b\Xb2+79\Xb2), 7.(A-6b)(A+6b)
1.(a+3)(a+3)
2.(b+4a)²
3.2a(-8a+3)
4.(b+2)(b+4)
5.-2a(-b+3-2a)
6.(5b²+7a²)(-5b²+79²)
7.(a-6b)(a+6b)
1.(a+3)(a+3)
a²+ 3a+3a+9
a²+6a+9
2.(b+4a)²
(b+4a)(b+4a)
b²+4ab+4ab+16a²
²+8ab+16a²
3.2a(-8a+3)
-16a²+6a
4.(b+2)(b+4)
b²+4b+2b+8
²+6b+8
5.-2a(-b+3-2a)
2ab-6a+4a²
4a²-6a+2a
6.(5b²+7a²)(-5b²+7a²)
-25b^4+35a²b² -35a²b²+49a^4
49a^4 -25b^4
7.(a-6b)(a+6b)
a²+6ab-6ab-36b²
a²-36b²
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