2x - y = -1 4х - 2у = -2
-4x + 3y = -3 <span><u>-4x + 3y = -3</u></span><span>
у = -5
х = (2у - 2) / 4 = -12 / 4 = -3 </span>
4(х^2-1)
5(t-2s)^2
c(1-27d^3)
v(u^3+w^3)
x y два числа
(x+y)/2 = 7
x^2- y^2=14
x+y = 14
(x-y)(x+y) = 14
x-y=1
2x = 15
x=7.5
y=6.5
x^2+y^2 = 56.25 + 42.25 = 98.5