-7x квадрат +13х+9=-19+13х

Question

-7x квадрат +13х+9=-19+13х

Answer 1

-7x^2+13x+9+19-13x=0
-7x^2+28=0
-7x^2=-28
x^2=4
x=2

Answer 2

-7х²+13х+9+19-13х=0
-7х²=-28
7х²=28
х²=4
х=2