Question

em cada equação abaixo de a solução a)x²-9=0 B)x²-10x+25=0​

Answer 1

a)x²-9=0

x²= 9

x= √9

x = ± 3 ✓

B)x²-10x+25=0

(x-5)² =0

x-5=0

x =5 ✓

Answer 2

$\large\boxed{\boxed{\boxex{{Ol\'a}}}}}$

$A)\:x^2-9=0$

$x^2=9$

$x=\sqrt{9}$

$x=3$

$B)\:x^2-10x+25=0$

$\LARGE{x_{1},_{2}=\frac{-b±\sqrt{b^2-4×a×c}}{2.a}}$

$\LARGE{x_{1},_{2}=\frac{10±\sqrt{(-10)^2-4.1.25}}{2.1}}$

$\LARGE{x_{1},_{2}=\frac{10±\sqrt{100-100}}{2}}$

$\LARGE{x_{1},_{2}=\frac{10±\sqrt{0}}{2}}$

$\LARGE{x_{1},_{2}=\frac{10±0}{2}}$

$\LARGE{x_{1},_{2}=5}$

qualquer dúvida,comente.