упростите выражение :
а)(5x-8)+(7-2x)
б)(4a^2-3)+(5-a-2a^2)
a)(6y+9)-(5-3y)
b)(8-9b^2)-(b^3-6b^2+7)
а)(5x-8)+(7-2x)
б)(4a^2-3)+(5-a-2a^2)
a)(6y+9)-(5-3y)
b)(8-9b^2)-(b^3-6b^2+7)
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Answers & Comments
b)2a^2+2-a
A)9y+4
B)1-3b^2-b^3