Question

решите систему уравнений x^2+y=5 6x^2-y=2

Answer 1

x² +y = 5
6x² -y = 2
+
x² +y +6x² -y = 5+2
7x² = 7
x² = 7/7
x² = 1
x = 1     x = -1
y = 5 - x²
x = 1    y = 5 -(1)² = 5-1 = 4
x = - 1   y = 5 -(-1)² = 5 -1 = 4 
x = 1    y = 4
x = -1    y = 4