Question

(4x+1)2=5y
(x+4)2=5y 
помагите

Answer 1

$left { {{16 x^{2} +8x+1=5y} atop { x^{2} +8x+16=5y}} right.$
вычитаем
$15 x^{2} -15=0$
$15 x^{2} =15$
$x^{2} =1$
$x_1=1$
$x_2=-1$
1.$left { {{x1=1} atop {16* 1^{2}+8*1+1=5y}} right.$
$left { {{x_1=1} atop {25=5y}} right.$
$left { {{x_1=1} atop {y_1=5}} right.$
2.$left { {{x_2=-1} atop {16*(-1)^2+8*(-1)+1=5y}} right.$
$left { {{x_2=-1} atop {9=5y}} right.$
$left { {{x_2=-1} atop {y_2=1,8}} right.$