Question

(x - 4)(x + 4) = 7
Решите пж

Answer 1

$(x-4)(x+4)=7\\x^{2} -16=7\\x^{2} =7+16\\x^{2} =23\\x_{1}=-\sqrt{23},x_{2}=\sqrt{23}$

Answer 2

Ответ:

x^2-16=7

x^2=23

x=+-корень из 23