Mathematics
Junior High
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5 次の式を展開しなさい。
(x-3y) (3x +2y)
2
3x² - y - by²
(3) (2x+52(2x+3)
-2x² + 10x + 25
(2) (3a+2) (3 a-5)
3a²² - 3a -1°
(4) (ab+4) (a+b+4)
2
² + ab +4a-ab-6²
a
+ 8 a = b ² + 16
a 2
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