Question

помогите решить 9;10 алгебра 7 класс​

Answer 1

$x^2 + 4x - 24 = 6x \\\\x^2 - 2x - 24 = 0 \\\\D = 2^2 + 4\cdot24 = 100 = 10^2 \\\\x_1 = \dfrac{2-10}{2} = -4 \\\\x_2 = \dfrac{2+10}{2} = 6$

$16^5-8^6 = 2^5\cdot8^5 - 8\cdot8^5 = (32-8)\cdot8^5 = 24\cdot8^5=3\cdot8\cdot8^5=3\cdot8^6$