Question

помогите с алгеброй 8 класс
ответ должен быть 2,4​

Answer 1

$\displaystyle\bf\\\sqrt[4]{\frac{(4,15)^{3} -(1,61)^{3} }{2,54} +4,15\cdot 1,61} =\\\\\\=\sqrt[4]{\frac{(4,15)-(1,61)[(4,15)^{2} +4,15\cdot1,61+(1,61)^{2} ] }{2,54} +4,15\cdot 1,61} =\\\\\\=\sqrt[4]{\frac{2,54\cdot[(4,15)^{2} +4,15\cdot1,61+(1,61)^{2} ] }{2,54} +4,15\cdot 1,61} =\\\\\\=\sqrt[4]{4,15^{2} +4,15\cdot1,61+1,61^{2} +4,15\cdot1,61} =\\\\\\=\sqrt[4]{4,15^{2} +2\cdot4,15\cdot1,61+1,61^{2}} =\sqrt[4]{(4,15+1,61)^{2} } =\\\\\\=\sqrt{4,15+1,61} =\sqrt{5,76} =2,4$