<span>x(4x+11)-7(x² -5x)=55x
4x²+11x-7x²+35x=55x
-3x²=9x
-3x=9
x=-3
</span>
Решение
1) (x⁵ + 1)` = 5x⁴
2) (- 1/x - 3x)` = 1/x² - 3
3) (4x⁴ + √x) = 16x³ + 1/2√x
4) ((1/3) * x³ - 2√x + 5/x)` = x² - 1/√x - 5/x²
5) ((5x - 4)*(2x⁴ - 7x + 1))` = 5*<span>(2x⁴ - 7x + 1) + (5x - 4)*(8x</span>³ - 7)
6) [(x³ - 7)/(3 - 4x⁴)]` = [3x² * (3 - 4x⁴) + 16x³ * (x³ - 7)] / (3 - 4x⁴)²
=64+243=307
Всего навсего
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(x-3)(x+3)/4x(x+3)=x-3)/4x