Thực hiện phép tính
1) 3\(a^2b+\left(-a^2b\right)+2a^2b-\left(-6a^2b\right)\) 2)\(\left(-4,2a^2\right)+\left(-0,3a^2\right)+0,5a^2+3a^2\)
3)\(15x^4+7x^4+\left(-20x^2\right)x^2\) 4)\(23\left(xy\right)^3+17x^3y^3+\left(-50x^3\right)y^3\)
thực hiện phép tính:
a,\(\left(x-y\right)^4:\left(x-2\right)^3\)
b,\(\dfrac{\left(3a^2b\right)^3\left(ab^3\right)^2}{\left(a^2b^2\right)^4}\)
thực hiện phép nhân
a) \(\left(X+1\right)\left(1+X-X^2+X^3-X^4\right)-\left(X-1\right)\left(1+X+X^2+X^3+X^4\right)\)
B) \(\left(2b^2-2-5b+6b^3\right)\left(3+3b^2-b\right)\)
c) \(\left(2ab+2a^2+b^2\right)\left(2ab^2+4a^3-4a^2b\right)\)
d) \(\left(2a^3-0,02a+0,4a^5\right)\left(0,5a^6-0,1a^2+0,03a^4\right)\)
1) Rút gọn :
\(B=\frac{\left(a+2b\right)^3-\left(a-2b\right)^3}{\left(2a+b\right)^3-\left(2a-b\right)^3}:\frac{3a^4+7a^2b^2+3b^4}{4a^4+7a^2b^2+3b^4}\)
thực hiện phép tính;
a,\(\dfrac{\left(3a^2b\right)^3\left(ab^3\right)^2}{\left(a^2b^2\right)^4}\)
b,\(\left(9x^2y^3-15x^4y^4\right):3x^2y-\left(2-3x^2y\right)y^2\)
c,\(\left(6x^2-xy\right):x+\left(2x^3y+3xy^2\right):xy-\left(2x-1\right)x\)
d,\(\left(x^2-xy\right):x+\left(6x^2y^5-9x^3y^4+15x^4y^2\right):\dfrac{3}{2}x^2y^3\)
a: \(=\dfrac{27a^6b^3\cdot a^2b^6}{a^8b^8}=27b\)
b: \(=3y^2-5x^2y^3-2y^2+3x^2y^3\)
\(=y^2-2x^2y^3\)
c: \(=6x-y+2x^2+3y-2x^2+x\)
\(=7x+2y\)
d: \(=x-y+2y^2-6xy+\dfrac{10x^2}{y}\)
thực hiện phép tính:
a,\(\left(x-y\right)^4:\left(x-2\right)^3\)
b,\(\dfrac{\left(3a^2b\right)^3\left(ab^3\right)^2}{\left(a^2b^2\right)^4}\)
a: Sửa đề: \(\left(x-2\right)^4:\left(x-2\right)^3\)
\(=\left(x-2\right)^{4-3}\)
=x-2
b: \(=\dfrac{27a^6b^3\cdot a^2b^6}{a^8b^8}=27b\)
Tính
a) \(3a^2b+\left(-3a^2b\right)+2a^2b-\left(-6a^2b\right)\)
b)\(\left(-4,2.f^2\right)+\left(-0,3.p^2\right)+0,5.p^2+3.p^2\)
Rút gọn các biểu thức:
\(A=\left(5a+5\right)^2+10\left(a-3\right)\left(1+a\right)+a^2-6a+9\)
B = \(\left(6a-2\right)^2+4\left(3a-1\right)\left(1-2b\right)\left(2b-1\right)^2\)
Phân tích thành nhân tử:
\(\left(3a-2b\right)^3-\left(2a-3b\right)\left(ab-6\right)^2-\left(2b-3a\right)^2\left(a+b\right)\)
Tính
a) \(3a^2b+\left(-3a^2b\right)+2a^2b-\left(-b.a^2b\right)\)
b)\(\left(-4,2.p^2\right)+\left(-0,3.p^2\right)+0,5.p^2+3.p^2\)