Question

Решите уравнения: . а) x^2=6 б) x^2=4,5 в) 81x^2=1 г) -0,7x^2=70 д) (y+6)^2=49 е) (2-y)^2=2 кисы))

Answer 1

$x^2=6 \\\ x=\pm \sqrt{6}$

$x^2=4,5 \\\ x=\pm \sqrt{4.5}$

$81x^2=1 \\\ x^2= \frac{1}{81} \\\ x=\pm \frac{1}{9}$

$-0,7x^2=70 \\\ 0,7x^2 \neq -70$

$(y+6)^2=49 \\\ y+6=7 \\\ y=7-6=1 \\\ y+6=-7 \\\ y=-7-6=-13$

$(2-y)^2=2 \\\ 2-y=\pm \sqrt{2} \\\ y=2\pm \sqrt{2}$