\(2x^2+5x+8+\sqrt{x}=x^2+3x+35+x^2+2x-7\)
\(2x^2+5x+8+\sqrt{x}=2x^2+5x+28\)
\(8+\sqrt{x}=28\)
\(\sqrt{x}=20\)
\(x=400\)
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tìm x biết:
a)\(2x^2+5x+8+\sqrt{x}=x^2+3x+35+x^2+2x-7\)
b)\(3\sqrt{x}+7x+5=\sqrt{x}+4x-6+3x+18\)
c)\(8\sqrt{x}+2x-9=5x+7+6\sqrt{x}-3x-12\)
d)\(2\sqrt{3x}+11x-18=5x+3+6\sqrt{3x}+6x-21\)
Tìm x,tính nhanh:
a.\(2x^2+5x+8+\sqrt{x}=x^2+3x+35+x^2+2x-7.\)
b.\(3\sqrt{x}+7x+5=\sqrt{x}+4x-6+3x+18\)
c.\(8\sqrt{x}+2x-9=5x+7+6\sqrt{x}-3x-12\)
d.\(2\sqrt{3x}+11x-18=5x+3+6\sqrt{3x}+6x-21\)
\(x^2+5x+6=3x+3\cdot4+2x-9\)
\(2\sqrt{x}+8x+5=5x-4+3x+19\)
\(5\sqrt{x}+2x-8=5x+4-3x-19\)
\(2x^2+5z+8+\sqrt{x}=x^2+3x+35+x^2+2x-7\)
\(3\sqrt{x}+7x+5=\sqrt{x}+4x-6+3x+18\)
\(2\sqrt{3x}+11x-18=5x+2+6\cdot\sqrt{3x}+6x-21\)
tìm x, biết:
A, x2 + 5x + 6 = 3x 34 + 2x -9
B, 2\(\sqrt{x}\)+ 8x + 5 = 5x - 4 + 3x + 19
C, 5\(\sqrt{x}\)+ 2x - 8 = 5x + 4 - 3x - 19
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
1, Tìm x
a,3x.(2x+3)-(2x+5).(3x-2)=8
b,5x(x+2)-x.(2x-7)-3x^2=81
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) 5x-3 {4x-2 [4x-3(5x-2)]}=182
2 tháng 3 2022 lúc 20:15
7.1 cho f (x) = X^5 + 3x^2-5x^3-x^7+x^3+2x^2+X^5-4x^2+2x^7
cho g(x)=x^4+4x^3-5x^8-x^7+x^3+x^2-2x^7+x^4- 4x^2-x^8
Tìm x, biết
1)2x.(5x-3x)+2x.(3x-5)-3(x-7)=3
2) 3x.(x+1)-2x.(x+2)=-1-x
3)2x^2+3(x^2-1)=5x.(x+1)
Mấy cậu giải chi tiết câu này giúp mk đc không!!!^-^