计算(1) (-3x²2y²)² ×(此为乘号)(2xy)³÷(xy)² (2)8(x+2)²-(3x-1)(3x+1)2.分解因式(1)(2x-1)(3x-2)-(2x-1)² (2)4a²-3b(4a-3b)3.已知a²+b²+4a-2b+5=0,求3a²+5b²-4的值.4.已知3
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![计算(1) (-3x²2y²)² ×(此为乘号)(2xy)³÷(xy)² (2)8(x+2)²-(3x-1)(3x+1)2.分解因式(1)(2x-1)(3x-2)-(2x-1)² (2)4a²-3b(4a-3b)3.已知a²+b²+4a-2b+5=0,求3a²+5b²-4的值.4.已知3](/uploads/image/z/6989295-39-5.jpg?t=%E8%AE%A1%E7%AE%97%281%29+%28-3x%26%23178%3B2y%26%23178%3B%29%26%23178%3B+%C3%97%28%E6%AD%A4%E4%B8%BA%E4%B9%98%E5%8F%B7%29%282xy%29%26%23179%3B%C3%B7%28xy%29%26%23178%3B++++++%282%298%28x%2B2%29%26%23178%3B-%283x-1%29%283x%2B1%292.%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%281%29%282x-1%29%283x-2%29-%282x-1%29%26%23178%3B++++++%282%294a%26%23178%3B-3b%284a-3b%293.%E5%B7%B2%E7%9F%A5a%26%23178%3B%2Bb%26%23178%3B%2B4a-2b%2B5%3D0%2C%E6%B1%823a%26%23178%3B%2B5b%26%23178%3B-4%E7%9A%84%E5%80%BC.4.%E5%B7%B2%E7%9F%A53)
计算(1) (-3x²2y²)² ×(此为乘号)(2xy)³÷(xy)² (2)8(x+2)²-(3x-1)(3x+1)2.分解因式(1)(2x-1)(3x-2)-(2x-1)² (2)4a²-3b(4a-3b)3.已知a²+b²+4a-2b+5=0,求3a²+5b²-4的值.4.已知3
计算
(1) (-3x²2y²)² ×(此为乘号)(2xy)³÷(xy)² (2)8(x+2)²-(3x-1)(3x+1)
2.分解因式
(1)(2x-1)(3x-2)-(2x-1)² (2)4a²-3b(4a-3b)
3.已知a²+b²+4a-2b+5=0,求3a²+5b²-4的值.
4.已知3a-2的算术平方根是4,2a+b-2的算术平方根是3,求a、b的值.
计算(1) (-3x²2y²)² ×(此为乘号)(2xy)³÷(xy)² (2)8(x+2)²-(3x-1)(3x+1)2.分解因式(1)(2x-1)(3x-2)-(2x-1)² (2)4a²-3b(4a-3b)3.已知a²+b²+4a-2b+5=0,求3a²+5b²-4的值.4.已知3
计算:
原式=288(xy)^5.
原式=-x^2+32x+33
分解因式:
(1)原式=(2x-1)(3x-2)-(2x-1)]
=(2x-1)(x-1).
(2)原式=(2a-3b)^2
3. 3a^2+5b^2-4=13.
4. a=6, b=-1.
2.分解因式
(1)(2x-1)(3x-2)-(2x-1)² =(2X-1)(3X-2-2X+1) =(2X-1)(X-1) (2)4a²-3b(4a-3b)=(2a-3b)(2a-3b)
3.已知a²+b²+4a-2b+5=0,求3a²+5b²-4的值.化简得:(a-2)(a-2)+(b-1)(b-1)=0解得...
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2.分解因式
(1)(2x-1)(3x-2)-(2x-1)² =(2X-1)(3X-2-2X+1) =(2X-1)(X-1) (2)4a²-3b(4a-3b)=(2a-3b)(2a-3b)
3.已知a²+b²+4a-2b+5=0,求3a²+5b²-4的值.化简得:(a-2)(a-2)+(b-1)(b-1)=0解得a=2,b=1,即可求得原式得13
4.已知3a-2的算术平方根是4, 2a+b-2的算术平方根是3,求a、b的值.3a-2=16,2a+b-2=9两式联立解得a=6,b=-1
收起
(1)、288x^5y^5
(2).-x^2+32x+33
2,(1). (x-1)(2x-1)
(2). (2a-3b)^2
3.a=-2,b=1.带入即可
4.a=6,b=-1
1、288x^5y^5
2、-x^2+32x+33
3、