(1)(4x-3y)^2 (2)(1.5a-2⼀3b)^2 (3)(25x^3+15^2-20x)÷(-5x) (4)(2⼀5y^3-7y^2+2⼀3y)÷2⼀3y

2024-12-20 13:42:34
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回答1:

(1)原式=(4x)^2-2*4x*3y+(3y)^2=16x^2-24xy+9y^2