Bài 3: Những hằng đẳng thức đáng nhớ
Các câu hỏi tương tự
1, tìm x :
a) (x+2).(x+3)-(x-2).(x+5)=0
b) (2x+3).(x-4)+(x-5).(x-2)=(x-4).(3x-5)
c) (3x-5).(7-5x)-(5x+2).(2-3x)=3
d)(x-7).(x+7)-(x-4)2-x=10+3
e) (x+1/2)2-(x-1).(x+1)=2x-1
2, Thu gọn :
a) (x+5)2-(3-x)2-2(x-4).(x+4)
b)4(x-1)2+(2x+3)2-8(x-2)(x+2)
1 Tìm x
a,(2.x-5)2-(2.x-3)(2x+3)=5
b,(x+3)3-x(x+4)(x-4)=27
c,(3x-2)2-(3x+5)2=4
d, (3x+5)2-(x-3)2=0
1.(x+2)3+(x-3)2-x2(x+5)
2.(2x+3).(x-5)+2x(3-x)+x-10
3.(x+5).(x2-5x+25)-x(x-4)2+16x
4.(-x-2)3+(2x-4).(x2+2x+4)-x2.(x-6)
23 tháng 9 2021 lúc 10:52
Tìm x:
(x+4)^2+(x-1)^2-2(x-5)(5+x)=21
a, (3x+5)2-(x+3)2-8x(x+3)=12
b, (2x-5)2-(x-2)2-(x-1)(3x+2)=8
c, -2x(x+3)+(2x-5)2=-3(x+2)
tìm x?
1, tìm x :
a) (x+2).(x+3)-(x-2).(x+5)=0
b) (2x+3).(x-4)+(x-5).(x-2)=(x-4).(3x-5)
c) (3x-5).(7-5x)-(5x+2).(2-3x)=3
d)(x-7).(x+7)-(x-4)2-x=10+3
e) (x+1/2)2-(x-1).(x+1)=2x-1
2, Thu gọn :
a) (x+5)2-(3-x)2-2(x-4).(x+4)
b)4(x-1)2+(2x+3)2-8(x-2)(x+2)
CMR:( x+y)^5-x^5-y^5=5xy(x+y)(x^2+xy+y^2)
1 Tìm x
a,(2.x-5)2-(2.x-3)(2x+3)=5
b,(x+3)3-x(x+4)(x-4)=27
c,(3x-2)2-(3x+5)2=4
d, (3x+5)2-(x-3)2=0
\(1, (-x+5)(x-2)+(x-7)(x+7)=(3x+1)^2-(3x-2)(3x+2)\)
\(2, (5x-1)(x+1)-2(x-3)^2=(x+2)(3x-1)-(x+4)^2+(x^2-x)\)
3, \((x-7)(x+1)-(x-3)^2=(3x-5)(3x+5)-(3x+1)^2 +(x-2)^2-x^2\)
Tìm x:
a, 4x ( x - 5 ) - ( x -1 ) ( 4x + 3 ) = 5
b, ( x - 5 ) ( x - 4 ) ( x + 1 ) ( x + 2 ) = 7
c, 2x ( x - 3 ) - 2 ( \(x^2\)- 4 ) = 4
d, ( x - 2 ) ( x + 2 ) = 5
e, ( x +1 )\(^2\) - \(x^2\) = 3
f, ( 2x - 3 )\(^2\) - 4x\(^2\) + 2 = 0