Eight answers to the exercises in Beijing Normal University's mathematics textbook - Training Enrollment Network

Eight answers to the exercises in Beijing Normal University's mathematics textbook

( 1)(a- 1)(7+x)

⑵3(a-b)(a-b-2)

(3)(m-n)(m-2n)

(4)(x-y)？

(5)(a？ +b？ )(m+n)

(6)6(a-b)？ (3a-5b)

(7)(2a+b)(-a-3b)

(8)-2xy(x+y)

Hope to adopt

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