利用乘法公式计算 (3a+2)^2-(2a-1)^2 (x-y)(x+y)-(2x-y)^2 [(x+2)(x-2)]^2 (a+3)(a-3)(a^2+9)(3a+2)^2-(2a-1)^2(x-y)(x+y)-(2x-y)^2 [(x+2)(x-2)]^2(a+3)(a-3)(a^2+9)

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/05 04:57:46
利用乘法公式计算 (3a+2)^2-(2a-1)^2 (x-y)(x+y)-(2x-y)^2 [(x+2)(x-2)]^2 (a+3)(a-3)(a^2+9)(3a+2)^2-(2a-1)^2(x-y)(x+y)-(2x-y)^2 [(x+2)(x-2)]^2(a+3)(a-3)(a^2+9)

利用乘法公式计算 (3a+2)^2-(2a-1)^2 (x-y)(x+y)-(2x-y)^2 [(x+2)(x-2)]^2 (a+3)(a-3)(a^2+9)(3a+2)^2-(2a-1)^2(x-y)(x+y)-(2x-y)^2 [(x+2)(x-2)]^2(a+3)(a-3)(a^2+9)
利用乘法公式计算 (3a+2)^2-(2a-1)^2 (x-y)(x+y)-(2x-y)^2 [(x+2)(x-2)]^2 (a+3)(a-3)(a^2+9)
(3a+2)^2-(2a-1)^2
(x-y)(x+y)-(2x-y)^2
[(x+2)(x-2)]^2
(a+3)(a-3)(a^2+9)

利用乘法公式计算 (3a+2)^2-(2a-1)^2 (x-y)(x+y)-(2x-y)^2 [(x+2)(x-2)]^2 (a+3)(a-3)(a^2+9)(3a+2)^2-(2a-1)^2(x-y)(x+y)-(2x-y)^2 [(x+2)(x-2)]^2(a+3)(a-3)(a^2+9)
(3a+2)^2-(2a-1)^2={(3a+2)+(2a-1)} * {(3a+2)-(2a-1)}=(5a+1)(a+1)=5a*a+6a+1.
(x-y)(x+y)-(2x-y)^2 =xx-yy-4xx+4xy-4=-3x²+4xy-y²-4.
[(x+2)(x-2)]^2=(x²-4)²=x^4-8x²+16.
(a+3)(a-3)(a^2+9)=(a²-9)(a²+9)=a^4-81.

(1)5a^2+16a+3
(2)-3x^2-2y^2+4xy
(3)x^4-8x^2-16
(4)a^4-81