\(^{3x^2\left(a^2+b^2\right)-3a^2b^2+3\left[x^2+\left(a+b\right)x+ab\right]\left[x\left(x-a\right)-b\left(x-a\right)\right]:2x^2=\dfrac{3}{2}x^2}\)
Tính giá trị
P=\(\left\{\left[ã-2\left(a+2\right)\right]\left[a\left(x-1\right)+2\right]+2\left(-a^2+4\right)3a^2.x\right\}:\left(-2ax\right)\)
Biết a=2 và x=1
Thực hiên phép tính sau
a) \(\left(2x-3\right)\left(x+2\right)\) b) \(\left(x-3\right)\left(2x+1\right)-\left(x-1\right)^2\)
Rút gọn biểu thức:
A=\(\text{4(x-1)(x+1)-5x(x-2)+x^2}\)
B=\(\left(y^2+2\right)\left(y-4\right)-\left(2y^2+1\right)\left(\dfrac{1}{2}y-2\right)\)
C=\(\left(3-2x\right)\left(x-2\right)-4\left(x-1\right)\left(x-3\right)-\left(x-2\right)\left(x+2\right)\)
Tìm x, biết
a) \(\left(3x+2\right)\left(2x+9\right)-\left(x+2\right)\left(6x+1\right)=\left(x+1\right)-\left(x-6\right)\)
b) \(3\left(2x-1\right)\left(3x-1\right)-\left(2x-3\right)\left(9x-1\right)=0\)
tính phép nhân
a, \(\left(x^2-2x+1\right).\left(x-1\right)\)
b,\(\left(x^3-2x^2+x-1\right)\left(x-2y\right)\)
Tìm \(x\) , biết:
a) \(\left(x+2\right)\left(x+3\right)-\left(x-2\right)\left(x+5\right)=6\)
b) \(\left(3x+2\right)\left(2x+9\right)-\left(x+2\right)\left(6x+1\right)=\left(x+1\right)-\left(x-6\right)\)
c) \(3\left(2x-1\right)\left(3x-1\right)-\left(2x-3\right)\left(9x-1\right)=0\)
CÁC BẠN LÀM NHANH GIÚP MIK NHA!
Câu 1: Tìm x:
a. \(\left(x-1\right)\left(x+2\right)-x^2+3=5\)
b. \(\left(2x+1\right)\left(x-3\right)-2x\left(x+7\right)=100\)
c. \(\left(3x-1\right)\left(x+2\right)-\left(2-3x\right)\left(x+3\right)=12\)
Câu 2: Chứng minh giá trị biểu thức sau không phụ thuộc vào biến
\(\left(x-5\right)\left(2x+3\right)-2x\left(x-3\right)+x+7\)
1.tìm x
a) \(\left(8-5x\right)\left(x+2\right)+4\left(x-2\right)\left(x+1\right)+2\left(x-2\right)\left(x+2\right)\)
b) \(4\left(x-1\right)\left(x+5\right)-\left(x+2\right)\left(x+5\right)=3\left(x-1\right)\left(x+2\right)\)
2. CMR
a) \(\left(x-y\right)\left(x^4+x^3y+x^2y^2+xy^3+y^4\right)=x^5-y^5\)
b)\(\left(x+y\right)\left(x^4-x^3y+x^2y^2-xy^3+y^4\right)=x^5+y^5\)
c)\(\left(x+a\right)\left(x+b\right)=x^2+\left(a+b\right)x+ab\)
giúp mik nha
chiều nay nộp r
Thực hiện phép tính :
a) \(\left(5x-2y\right)\left(x^2-xy+1\right)\)
b) \(\left(x-1\right)\left(x+1\right)\left(x+2\right)\)
c) \(\dfrac{1}{2}x^2y^2\left(2x+y\right)\left(2x-y\right)\)