4x-16x³,(-3分之1)的-2次方+(9分之1)的0次方+(-5)³÷(-5)²
问题描述:
4x-16x³,(-3分之1)的-2次方+(9分之1)的0次方+(-5)³÷(-5)²
答
4x-16x³
=4x(1-4x²)
=4x(1-2x)(1+2x)
(-1/3)^-2+(1/9)^0+(-5)^3÷(-5)^2
=9+1+(-5)^1
=10-5
=5(-3x³)²·x³+(-4x)²·x的7次方-(5x³)²=(m-2n)(m+2n)-(-m+n)²=9(x-2y)²-4(x+2y)²=x²(a-b)+9(b-a),要详细过程(-3x^3)^2×x^3+(-4x)^2×x^7-(5x^3)^2=9x^6+16x^9-15x^6=16x^9-6x^6=2x^6(8x^3-3)(m-2n)(m+2n)-(-m+n)²=m²-4n²-n²+2mn-m²=2mn-5n²=n(2m-5n)9(x-2y)²-4(x+2y)²=(3x-6y+2x+4y)(3x-6y-2x-4y)=(5x-2y)(x-10y)x²(a-b)+9(b-a)=x²(a-b)-9(a-b)=(x²-9)(a-b)=(x+3)(x-3)(a-b)