Question

решить уравнение
16x^2=49

Answer 1

$16x^2=49$
$x^2=49:16$
$x^2=3,0625$
$|x|= sqrt{3,0625}$
$x=-1,75$
$x=1,75$
$Otvet:-1,75;1,75.$

Answer 2

всё гораздо проще!:

Answer 3

$16x^2=49 \ 16x^2-49=0 \ (4x-7)(4x+7)=0 \ 4x-7=0 \ 4x=7 \ x=1,75 \ \ 4x+7=0 \ 4x=-7 \ x=-1,75 \ \ Otvet:1,75;-1,75$