Question

Пажалуйста зделай те ето

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Answer 1

Ответ: 1) $4\sqrt{a} +10\sqrt{a} -9\sqrt{a} =5\sqrt{a}$

2)$(3\sqrt{11} -\sqrt{77})\sqrt{11} =33-\sqrt{847} =33-11\sqrt{7}$

3) $4*3\sqrt{3b} -5*4\sqrt{3b} +\frac{1}{4} *8\sqrt{3b} =12\sqrt{3b} -20\sqrt{3b} +2\sqrt{3b} = -6\sqrt{3b}$

4) $12*3+12+2\sqrt{7} -3\sqrt{7} -\sqrt{7} *2\sqrt{7} = 36+24\sqrt{7} -3\sqrt{7} -14=22+21\sqrt{7}$

5) $49-56\sqrt{3}+48+16+24\sqrt{3} +27=140-32\sqrt{3}$

6) $7-(\sqrt{2} -1)^{2}=7-(2-2\sqrt{2}+1)=7-(3-2\sqrt{2})=7-3+2\sqrt{2} =4+2\sqrt{2}$