Các câu hỏi tương tự
1không thuc hiên phép tính hay ss :\(\frac{221}{222};\frac{443}{445};\frac{665}{668}\)
2 rut gon \(A=\frac{2+\sqrt{3+\sqrt{5-\sqrt{48}}}}{\sqrt{6}+\sqrt{2}}\)
rut gon bieu thuc (2x+3) mũ 2 +(2x+5) mũ 2
B1: rut gon bieu thuc
a, (x+y)^2-4(x-y)^2
b, 2(x-y)(x+y)+(x+y)^2+(x-y)^2
B2: tim X
a, (2X-1)^2-4(X+2)^2=9
b, 3(X-1)^2-3X(X-5)=21
B3: Cho bieu thuc
M=(x+3)^3-(x-1)^3+12x(x-1)
a, Rut gon bieu thuc tren
b, Tinh gia tri M tai x=-2/3
c, Tim x de M=16
rut gon bieu thuc.
A)(X^2-1).(X+2)-(X-2).(X^2+2X+4)
B)(2X+3)^2+(2X+5)^2-2.(2X+5).(2X+3)
(4x-3)(3x+2)-(6x+1)(2x-5)+1
rut gon bieu thuc
rut gon bieu thuc :P=5x(x-3)(x+3)-(2x-3)^2+34x(x+2)-5(x+2)^3+25x-1
giup mink nhe !!
rut gon bieu thuc sau
(2x-y+5)^2+(4x-2y+10)(y-2x)+(2x-y)^2
Rut gon bieu thuc
B=(x+2/x+3)-(5/x^2+x-6)+(1/2-x)
rut gon bieu thuc M=1/x - 2/(5-x) - x+5/(x^2-5x) voi x khac 0 ; x khac 5