Question

25 la a 2 - x la a 2 = 7 la a 2

Answer 1

25²-x²=7²
25²=625
7²=49
625-x²=49
625-49=x²
576=x²⇒x=√576⇒x=24
ca verificare
25²-24²=625-576=49
dar 49 inseamna 7x7, adica 7²

Answer 2

$25^{2}- x^{2} = 7^{2}=> x^{2} =625-49=> x^{2} =576=>x=24$