Question

[tex]a)x^{2} =9
b) x^{2} -49=0

Answer 1

a) $x^{2} =9$ =>x=3
b)$x^{2} -49=0$ =>$x^{2} =49=\ \textgreater \ x=7$

Answer 2

x²=9⇒x²=3²[2=2]⇒x=3;
b. x²-49=0⇒x²=49⇒x2=7²⇒x=7;