Question

3 la a doua plus x la a doua egal 5 la a doua​

Answer 1

$\it 3^2+x^2=5^2 \Rightarrow x^2=5^2-3^2 \Rightarrow x^2=25-9 \Rightarrow x^2=16 \Rightarrow \sqrt{x^2}=\sqrt{16} \Rightarrow \\ \\ \Rightarrow |x|=4 \Rightarrow x=\pm4$

Answer 2

Răspuns:

3²+ײ=5²

x²=5²-3²

x²=25-9

x²=16