几道数学代数因式分解题1.1/2x²-8ax+32a²2.x²(x²-y²)+z²(y²-x²)3.(x+2)(x+4)+14.已知a²+b²+4a-2b+5=0,求a、b的值.* * * * * * * * * ★ * ★ * * ★ * >>>------I love you!---->* * * ★ * *
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![几道数学代数因式分解题1.1/2x²-8ax+32a²2.x²(x²-y²)+z²(y²-x²)3.(x+2)(x+4)+14.已知a²+b²+4a-2b+5=0,求a、b的值.* * * * * * * * * ★ * ★ * * ★ * >>>------I love you!---->* * * ★ * *](/uploads/image/z/1325281-49-1.jpg?t=%E5%87%A0%E9%81%93%E6%95%B0%E5%AD%A6%E4%BB%A3%E6%95%B0%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E9%A2%981.1%2F2x%26sup2%3B-8ax%2B32a%26sup2%3B2.x%26sup2%3B%28x%26sup2%3B-y%26sup2%3B%29%2Bz%26sup2%3B%28y%26sup2%3B-x%26sup2%3B%293.%28x%2B2%29%28x%2B4%29%2B14.%E5%B7%B2%E7%9F%A5a%26sup2%3B%2Bb%26sup2%3B%2B4a-2b%2B5%3D0%2C%E6%B1%82a%E3%80%81b%E7%9A%84%E5%80%BC.%2A+%2A+%2A+%2A+%2A+%2A+%2A+%2A+%2A+%E2%98%85+%2A+%E2%98%85+%2A+%2A+%E2%98%85+%2A+%3E%3E%3E------I+love+you%21----%3E%2A+%2A+%2A+%E2%98%85+%2A+%2A)
几道数学代数因式分解题1.1/2x²-8ax+32a²2.x²(x²-y²)+z²(y²-x²)3.(x+2)(x+4)+14.已知a²+b²+4a-2b+5=0,求a、b的值.* * * * * * * * * ★ * ★ * * ★ * >>>------I love you!---->* * * ★ * *
几道数学代数因式分解题
1.1/2x²-8ax+32a²
2.x²(x²-y²)+z²(y²-x²)
3.(x+2)(x+4)+1
4.已知a²+b²+4a-2b+5=0,求a、b的值.
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几道数学代数因式分解题1.1/2x²-8ax+32a²2.x²(x²-y²)+z²(y²-x²)3.(x+2)(x+4)+14.已知a²+b²+4a-2b+5=0,求a、b的值.* * * * * * * * * ★ * ★ * * ★ * >>>------I love you!---->* * * ★ * *
1.1/2(x-8a)² 这个就是把1/2提出来就行了
2.(x+z)(x-z)(x+y)(x-y) 这个先化成(x²-y²)(x²-z²)
3.(x+3)² 这个是先乘开,相加是x²+6x+8+1=x²+6x+9=(x+3)²
4.(x+2)²+(y-1)²=0
x=-2 y=1 这个就是把式子分成x²+4x+4+y²-2y+1=0
然后化成(x+2)²+(y-1)²=0
由于两个式子都是大于等于0的,相加为0
所以两个式子都等于0
所以x+2=0 y-1=0
x=-2 y=1