Các câu hỏi tương tự
Bài 1. Tìm x.a) -5(x2-3x+1)+x
(1+5x)x-2b) 12x2-4x(3x+5)10x-17c) -4x(x-5)+7x(x-4)-3x212Bài 2. Tính ( Rút gọn).a) (x+5).(x-7)-7x.(x-3)b) x.(x2-x-2)-(x-5).(x+1)c) (x-5).(x-7)-.(x+4).(x-3)d) (x-1).(x-2)-(x+5).(x+2)
Đọc tiếp
Bài 1. Tìm \(x\).
a) -5(\(x\)2-3\(x\)+1)+\(x \)(1+5\(x\))=\(x-2\)
b) \(12x\)2\(-4x\)\((3x+5)\)\(=10x-17\)
c) \(-4x(x-5)+7x(x-4)-3x\)2\(=12\)
Bài 2. Tính ( Rút gọn).
a) \((x+5).(x-7)-7x.(x-3)\)
b) \(x.(x\)2\(-x-2)-(x-5).(x+1)\)
c) \((x-5).(x-7)-.(x+4).(x-3)\)
d) \((x-1).(x-2)-(x+5).(x+2)\)
a,5^x+4-3×5^x+3=2×5^11
b,3×5^x+2+4×5^x-3=19×5^10
c,6×8^x-1+8^x-1=6×8^19+8^21
d,5×2^x+3×2^x+2=5×2^5+3×2^7
B1:tìm x biết a, (-2+x^2)(x^2-2)(x^2-2)(x^2-2)(x^2-2)=1 b, (2x+3)(x-4)+(x-5)(x-2)=(3x-5)(x-4) c,(8x-3)(3x+2)-(4x+7)(x+4)=(4x+1)(5x-1) d, 2x^2+3(x-1)(x+1)=5x(x+1) e, (8-5x)(x+2)+4(x-2)(x+1)=(2+x)(2-x) f, 4(x-1)(x+5)-(x+2)(x+5)=3(x-1)(x+2)
Bài 1:
a, (-2+x\(^2\))(x\(^2\)-2)(x\(^2\)-2)(x\(^2\)-2)(x\(^2\)-2)=1
b, (2x+3)(x-4)+(x-5)(x-2)=(3x-5)(x-4)
c, (8x-3)(3x+2)-(4x+7)(x+4)=(4x+1)(5x-1)
d,2x\(^2\)+3(x-1)(x+1)=5x(x+1)
e,(8-5x)(x+2)+4(x-2)(x+1)=(2+x)(2-x)
f, 4(x-1)(x+5)-(x+2)(x+5)=3(x-1)(x+2)
Tìm x
a)(2/5)^x >(2/5)^3×(-2/5)^2
b)5^x+5^x+2=650
Tính(x)+g(x)và f(x)-f(x)với:
a)f(x)=x^5-3x^2+x^3-x^2-2x+5;g(x0=x^2-3x+1+x^2-x^4+X^5
b)f(x)=x^7-3x^2-x^5+x^4-x^2+2x-7;g(x)=x-2x^2+x^4-X^5-x^7-4x^2-1
x2= 1
x2=3
x2=5 với x<0
x2=7 với x<0
x2=9
(x-2)2=2
(x-4)2=4
(x-6)2=6
(x-8)2=8
(x-10)2=10
(x-\(\sqrt{3}\) )2=3
(x-\(\sqrt{5}\))2=5
Bài 1: a, x + 0,5 = -2/3 b, x - (-2/5) = 5/7 c, 5/4 - 6x = 7 1/2 d, 3 - 2x - (5/4 - 7/5) = 9/20 bài 2: a, x : (-2/3) mũ 3 = -2/3 b, (2/5) mũ 5 nhân x = (2/5) mũ 7 c, 343/125 = (7/5) mũ x d, (-1/3) nhân x = 1/243
a 2/3×(x+1)-4/5×(x+2)=35/2 b 4(x-2)+5(x+1)=-15 c 3/2:x+(-5/2)=-7/3