Question

Решите уравнение
1)64-x²=0
2)81y²-100=0​

Answer 1

$64-x^2=0\x^2=64\x=pm 8\x_1=-8 x_2=8\\81y^2-100=0\81y^2=100\y^2=frac{100}{81}\\y=pm frac{10}{9} \y_1=-frac{10}{9} y_2=frac{10}{9}$