(5X+3)平方乘以(3-5X)平方

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(5X+3)平方乘以(3-5X)平方(5X+3)平方乘以(3-5X)平方(5X+3)平方乘以(3-5X)平方(5x+3)^2(3-5x)^2=[(5x+3)(3-5x)]^2=[3^2-(5x)^2]

(5X+3)平方乘以(3-5X)平方
(5X+3)平方乘以(3-5X)平方

(5X+3)平方乘以(3-5X)平方
(5x+3)^2(3-5x)^2=[(5x+3)(3-5x)]^2=[3^2-(5x)^2]^2
=(9-25x^2)^2=625x^4-450x^2+81

(9-25x^2)^2=81-2*9*25*x^2+625x^4

(9-25x^2)^2