b,x3+12x2+48x+64-x3-12x2=16
48x+64=16
12x+16=4
x=1
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Bài 3: Những hằng đẳng thức đáng nhớ
Các câu hỏi tương tự
mọi người ơi giúp mik vs
bt Thực hiện phép tính
a) (x-2)^3 - x(x+1)(x-1)+6x(x-3)
b) (x-2)(x^2-2x+4)(x-2)(x^2+2x+4
thu gọn biểu thức
a) (6x-2)2+4(3x-1)(2+y)+(y+2)2-(6x+y)2
b)5(2x-1)2+2(x-1)(x+3)-2(5-2x)2-2x(7x+12)
c)2(5x-1)(x2-5x+1)+(x2-5x+1)2+(5x-1)2-(x2-1)(x2+1)
d)(x2+4)2-(x2+4)(x2-4)(x2+16)-8(x-4)(x+4)
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)
1.(x+2)3+(x-3)2-x2(x+5)
2.(2x+3).(x-5)+2x(3-x)+x-10
3.(-x-2)3+(2x-4).(x2+2x+4)-x2.(x-6)
Tìm x biết
b) ( 2x + 3)^2 – (2x + 1)(2x – 1) = 22
c) ( 4x + 3)( 4x – 3) – (4x -5)^2 = 16 d) x^3 – 9x^2+ 27x – 27 = - 8
e) (x + 1)^3 – x2 (x + 3) = 2 ; f) (x – 2)^3 – x( x – 1)(x + 1) + 6x2 =5
Tìm x
a) ( 2x + 1 )2- 4x2 + 2x2 - 2 = 0
b) ( x - 2 ) . ( x + 2 ) - ( x + 3 )2 - 2x - 5 = 0
Giúp mình với ;-;
Tìm x. biết:
a/12(x-2)(x+2)-3(2x+3)2 =52
b/(2x+1)2 -4(x-1)(x+1)+2x=5
c/(x-2)3-(x-3)(x2+3x+9)+6(x+1)2=15
d/(x+2)(x2-2x+4)-x(x2+2)=15
e/ 12(x-2)(x+2)-3(2x+3)2=57
f/ (3-x)(3+x)+(3x-1)2+6x=522
g/(2x+1)2-4(x-1)(x+1)+2x=5
tìm x biết:
a) (x-3)2-4=0
b) x2-2x=24
c) (x+4)2-(x+1)(x-1)=16
d) (2x+1)2-4(x-1)2=9
e) (x+3)2-(x-4)(x+8)=1
f) (2x-1)2+(x+3)2-5(x+7)(x-7)=0
g) 3(x+2)2+(2x-1)2-7(x+3)(x-3)=36
Tìm x, biết:
a) x3 - 9x2 + 27x - 27 = -8
b) 64x3 + 48x2 + 12x + 1 = 27
c) (2x - 1)3 - 4x2. (2x - 3) = 5
d) (x + 4)3 - x2. (x + 12) = 16