Question

(2x + 2y)²+ (2y + 1)² = 9

Mn giúp mik vs ah 

Trc 6h 30 sáng 4/3 ah

 

Answer 1

TH1: (2y+1)^2=9 và (2x+2y)^2=0

=>x+y=0 và \(2y+1\in\left\{3;-3\right\}\)

=>\(\left(x,y\right)\in\left\{\left(-1;1\right);\left(2;-2\right)\right\}\)

TH2: (2y+1)^2=0 và (2x+2y)^2=9

=>\(\left(2y+1;2x+2y\right)\in\left\{\left(0;3\right);\left(0;-3\right)\right\}\)

=>\(\left(x,y\right)\in\left\{\left(-\dfrac{1}{2};2\right);\left(-\dfrac{1}{2};-1\right)\right\}\)