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

-36b²


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