Tim cac so nguyen x thoa man
A)/2x-2/=x+18. :-) B)/2x-8/+4x=16
so cac so nguyen x thoa man 15-|-2x+3|*|5+4x|=19 tim so cac so nguyen x giup minh nhe
!
Tim tat cac cac cap so nguyen x,y thoa man a) x^2+5xy+4y^2
b)xy-2x+3y-1
Tim tat cac cac cap so nguyen x,y thoa man a) x^2+5xy+4y^2
b)xy-2x+3y-1
Tim tat cac cac cap so nguyen x,y thoa man a) x^2+5xy+4y^2
b)xy-2x+3y-1
tim cac so nguyen x,y thoa man:x^3+2x^2+3x+2=y^3
Tim cac gia tri nguyen cua x biet
a, Y=5x+9/ x+3
b, Tim cac cap so nguyen x , y thoa mai he thuc :
(2x-1).(y+4)
\(a,\) Ta có \(y=\frac{5x+9}{x+3}\)
Để \(y\) nhận giá trị nguyên thì : \(5x+9⋮x+3\)
\(\Rightarrow5\left(x+3\right)+9-15⋮x+3\)
\(\Rightarrow5\left(x+3\right)-6⋮x+3\)
\(\Rightarrow-6⋮x+3\)
\(\Rightarrow6⋮x+3\)
\(\Rightarrow x+3\inƯ_{\left(6\right)}\)
\(\Rightarrow x+3=\left(-6,-3,-2,-1,1,2,3,6\right)\) Máy tớ ko viết được ngoặc khép thông cảm nha
\(\Rightarrow x=\left(-9,-6,-5,-4,-2,-1,0,3\right)\)
so cac so nguyen x thoa man 15 - |-2x +3|.|5+4x| = -19
tim cac so nguyen duong x,y thoa man 2x+3y=14
Vì 14 ⋮ 2 => 2x + 3y ⋮ 2
Mà 2x ⋮ 2 => 3y ⋮ 2
Mà ( 2; 3) = 1 => y ⋮ 2
2x + 3y = 14 => 3y ≤ 14
=> y ≤ 14 / 3 => y ≤ 4 => y = 2 ; 4
Với y = 2 <=> 2x + 6 = 14 => 2x = 8 => x = 4
Với y = 4 <=> 2x + 12 = 14 => 2x = 2 => x = 1
Vậy ( x;y ) = { ( 4;2 ) ; ( 1 ; 4 ) }
So cac so nguyen x thoa man 15 - |-2x+3|.|5+4x| = -19 la