bài 1 :tìm x , biết :
(x-7)^ x+1(x-7)^x+11=0
bài 2 :tìm x , biết :
a,|2x-3| > 5 c,|3x-1| ≤ 7 d,|3x-5| + |2x+3| = 7
bài 3 :
a,tính tổng S = 1 + 5^2 + 5^4 + ....... + 5^200.
b,so sánh 2^30 + 3^30 + 4^30 và 3.24^10
Bài 2 Tìm x biết 1, (2x-2).(3x+1)-(3x-2).(2x-3)=5 2,(1-3x).(3x-5)-(2x-4)(2-3x)=x-6 3,(2x-1).(4x^2+2x+1)-(2x+1)(4x^2-2x+1)=5x+6 Giúp tớ với
Tìm x biết :
a, 4.(18 - 5x) - 12.(3x - 7) = 15.(2x - 16) - 6(x + 14)
b, 5.(3x + 5) - 4.(2x - 3) = 5x + 3.(2x + 12) + 1
c, 2.(5x - 8) - 3.(4x - 5) = 4.(3x - 4) + 11
d, (3x + 2)(2x + 9) - (x + 2)(6x + 1) = (x + 1) - (x - 6)
e, (8x - 3)(3x + 2) - (4x + 7)(x + 4)= (2x + 1)(5x - 1) - 33
Bài : Rút gọn
1) (3x - 5).(7-5x)-(5x+2).(2-3x)
2) (3x2+5x-2).(2x2-4x+3)
3) (3x2+5x-2).(2x2-4x+3)
4)4(2x3+x)-(2x-1)(4x2+3x+1)
5) 2x(x+3)-(x-5).(7+2x)
Nhanh + đúng auto tick :Đ!
Tìm x biết
2(x - 3) + 5 = 3x - 1
2x(3x + 2) - 5 = 3( 2x^2 - 2x + 1)
(3x - 2)(2x - 3) + 5 = 5
giải chi tiết giùm mình
Tìm nghiệm : a) (2x-3).(2x+3) B)(x-4).(x-1).(x-2) C)2x(3x-1)-3x(5+2x) D)(3x-2).(3x+2)-4.(x-1)
a, 3-3/2.(2x-1)-1/2.(3x+2)=2x-3
b, 7/2+1/2.(4x-3/2)-1/3.(3-6x)=1/2.(x-1)
c, 3/2.(2x-1/2)-7/2.(3x+1/3)-1/2.(2x-1)=3x+5
Tìm x:
a,|3x+1|-|2x-5|+|12-x|=2x+3
b,|x-1|+2|3x+2|-|5x-3|=|3x+7|-1
tìm x ;
a , | x | + | x + 2 | = 3
b , | 2x + 1 | + | x + 8 | = 4x
c, | 3x + 5 | + | 3 - 3x | = 2x - 1
d , | 2x - 1 | - | 3x - 3 | = 2x - 5 +( x - 2)
e , | 3x - 1 | + | x - 2 | = 2x + 3
1) x+1/x-2=3/4
2)x-1/3=x+3/5
3)2x+3/24=3x-1/32
4)2x+3/6=7x-3/15
10)12-7x/-13=4-3x/-5
các bạn trả lời nhanh dùm mình nhoaa!