Question

Tìm x,biết

36x² - 49 = 0

Answer 1

36x^2 - 49=0 =>(6x-7)(6x+7)=0

6x-7=0 =>x=7/6

6x+7=0=>x=-7/6

Answer 2

\(\left(6x\right)^2=7^2\)

6x=+-7

\(x=+-\frac{7}{6}\)