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azolber
27.04.2021 •
Mathematics
For better clarification I guess
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Ответ:
1.)![=\frac{\sqrt{3}}{3}](/tpl/images/2316/7721/ff8fa.png)
2.)![42\sqrt{30}](/tpl/images/2316/7721/c8e86.png)
Step-by-step explanation:
1.)![\mathrm{Multiply\:by\:the\:conjugate}\:\frac{\sqrt{3}}{\sqrt{3}}](/tpl/images/2316/7721/d10d9.png)
2.)![\mathrm{Apply\:radical\:rule}:\quad \sqrt{a}\sqrt{b}=\sqrt{a\cdot b}](/tpl/images/2316/7721/4a629.png)
Ответ:
3(3x + 3) - 5x - 4 = 25
9x + 9 - 5x - 4 = 25
9x - 5x - 4 = 16
4x - 4 = 16
4x = 20
x = 5