\(\left(2x-1\right)\left(2x+1\right)-\left(3-2x\right)^2=242\)
\(4x^2-1-9+12x-4x^2=242\)
\(12x-10=242\)
\(12x=252\Rightarrow x=21\)
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Tính (rút gọn )
1, 2x(3x-1)-(2x+1)(x-3)
2, 3(x^2-2x)-(4x+2)(x-1)
3, 3x(x-5)-(x-2)^2 -(2x+3)(2x-3)
4, (2x-3)^2+(2x-1) (x+4)
d) (3x – 5)(7 – 5x) – (5x + 2)(2 – 3x) = 4 g) 3(2x - 1)(3x - 1) - (2x - 3)(9x - 1) =0 j) (2x – 1)(3x + 1) – (4 – 3x)(3 – 2x) = 3 k) (2x + 1)(x + 3) – (x – 5)(7 + 2x) = 8 m) 2(3x – 1)(2x + 5) – 6(2x – 1)(x + 2) = - 6
(2x-3)^2+(2x-1)(2x+1)-(2x+1)(4x^2-2x+1)+8x^3(x-1)=13
giải phương trình sau
a.1/2+|x-3/2|=5/2
b,7/3|2x+1|=2
c.|2x-1|=x+2
d.|3-2x|=3x-1
e.|2x+1|=x-2
f.|2x+3|=|x-2|
g.|x-1|=|2x+5|
Thực hiện phép tính
a, (2x+1)^2+(2x-1)^2-2(2x+1)(2x-1)
b,(2x^3-3x^2+6x-9)(2x-3)
tìm x:
a)3(2x-3)+2(2-x)=-3
b)2x(x2-2)+x2(1-2x)-x2=-12
c)3x(2x+3)-(2x+5)(3x-2)=8
d)4x(x - 1) - 3(x2-5)-x2=(x-3)-(x+4)
e)2(3x-1)(2x+5)-6(2x-1)(x+2)=-6
Rút gọn:
a)2x.(3x-1)-(x-3).(6x+2)
b)(2x-3)2-(1+2x).(2x-1)+3.(2x-3)
c)(x+y-1)2-2.(x+y-1).(x+y)+(x+y)2
Khai triển và thu gọn:
1, x(3x - 1) - 2x(x - 1) - (x - 2)2
2, x(2 + x) - (x - 1)(3 - x)-(3 - x)2
3, (2x - 1)2 - 2(2x - 1)(2x - 3) + (3 - 2x)2
a) (x2+1)2+3x(x2+1)+2x2=0
b) (x2-9)2=12x+1
c) (4-x)5+(x+3)5=32
d) (x-1)5+(x-8)5=242(x+1)
e) (x-7)4+(x-8)4=(15-2x)4